SHINICHI WATANABE
| Emeritus Professor etc. | Emeritus Professor |
Researcher Information
Degree
Research Keyword
Career
- 01 Apr. 2010
電気通信大学大学院情報理工学研究科, 教授 - 01 Apr. 2000 - 31 Mar. 2010
Faculty of Electro-Communications, Professor - Jan. 1988 - Mar. 2000
Faculty of Electro-Communications, Associate Professor - Oct. 1982 - Dec. 1987
CNRS（フランス）, Charge de Recherche - Oct. 1981 - Sep. 1982
Paris Observatory at Meudon-Paris, Post Doctor
Educational Background
Research Activity Information
Paper
- Dual-channel scattering problem in the cavity-like potential
Tomotake Yamakoshi; Shinichi Watanabe
European Journal of Physics, IOPScience, 43, 3, 035401, 17 Feb. 2022, Peer-reviwed
Scientific journal, English - Signatures of inter-band transitions on dynamical localization
Sara Medhet; Tomotake Yamakoshi; Muhammad Ayub; Farhan Saif; Shinichi Watanabe
The European Physical Journal D (EPJ D), Springer, 74, 8, 175-183, 25 Aug. 2020, Peer-reviwed
Scientific journal, English - Fast and selective interband transfer of ultracold atoms in bichromatic lattices permitting Dirac points
Tomotake Yamakoshi; Shinichi Watanabe
Phys. Rev. A, American Physical Society, 99, 013621-1-013621-13, 24 Jan. 2019, Peer-reviwed
Scientific journal, English - Opto-mechanical switch via enhanced luminality control
Farhan Saif; Kamran Ullah; Shinichi Watanabe
AIP Conference Proceedings, AIP, 2067, 020002-1-020002-10, 24 Jan. 2019, Peer-reviwed
International conference proceedings, English - Significantly stable mode of the ultracold atomic wave packet in amplitude-modulated parabolic optical lattices
Tomotake Yamakoshi; Farhan Saif; Shinichi Watanabe
Physical Review A, American Physical Society, 97, 023620-1-023620-7, 13 Feb. 2018, Peer-reviwed
Scientific journal, English - Dynamics of fermions in an amplitude-modulated lattice
Tomotake Yamakoshi; Shinichi Watanabe; Shun Ohgoda; Alexander P. Itin
PHYSICAL REVIEW A, AMER PHYSICAL SOC, 93, 6, 063637-1-063637-7, Jun. 2016, Peer-reviwed, We study the dynamics of fermions loaded in an optical lattice with a superimposed parabolic trap potential. In the recent Hamburg experiments [J. Heinze et al., Phys. Rev. Lett. 110, 085302 (2013)] on quantum simulation of photoconductivity, a modulation pulse on the optical lattice transferred part of the population of the lowest band to an excited band, leaving a hole in the particle distribution of the lowest band. The subsequent intricate dynamics of both excited particles and holes can be explained by a semiclassical approach based on the evolution of the Wigner function. Here we provide a more detailed analysis of the dynamics, taking into account the dimensionality of the system and finite-temperature effects, aiming at reproducing experimental results on longer time scales. A semiclassical wave packet is constructed more accurately than in the previous theory. As a result, semiclassical dynamics indeed reproduces experimental data and full quantum numerical calculations with a much better accuracy. In particular, the fascinating phenomenon of collapse and revival of holes is investigated in more detail. We presume that the experimental setup can be used for deeper exploration of nonlinear waves in fermionic gases.
Scientific journal, English - Hyperspherical calculations of ultralow-energy collisions in Coulomb three-body systems
Yueming Zhou; Shinichi Watanabe; Oleg I. Tolstikhin; Toru Morishita
Physical Review A, American Physical Society, 92, 032713-1-032713-10, 29 Sep. 2015, Peer-reviwed
Scientific journal, English - Wave-packet dynamics of noninteracting ultracold bosons in an amplitude-modulated parabolic optical lattice
Tomotake Yamakoshi; Shinichi Watanabe
Physical Review A, Americal Physica Society, 91, 063614-1-063614-8, 12 Jun. 2015, Peer-reviwed, The recent Aarhus experiment [Phys. Rev. A 88, 023620 (2013)] produced wave packets by applying amplitude modulation to a trapped Bose–Einstein condensate (BEC) of Rb87 using an optical lattice. The present paper renders a theoretical account of this experimental production of wave packets and their subsequent time evolution, focusing on a one-dimensional noninteracting bosonic system as a fundamental starting point for accurate quantum analysis. Since experimental manipulation requires efficient wave-packet creation, we introduce the “single-Q Rabi model” to give a simple and reliable description of the interband transition. As a natural extension, we demonstrate enhancement of the wave-packet production by the “two-step Rabi oscillation method” using either one or two frequencies. The subsequent time evolution is affected by the intertwining of Bragg reflection and the Landau–Zener transition at each band gap, which is analyzed with the aid of a semiclassical theory [Phys. Rev. Lett. 110, 085302 (2013)].
Scientific journal, English - Theoretical/Experimental Structural Analysis of Protein-Ligand Interaction between GST and its Fluorogenic Binder Created by the 10BASE_d-T
K.Yahiro; T.Yamakoshi; J.Yang; S.Watanabe; M.Taki
Peptide Science 2015, The Japanese Peptide Society, 89-90, 2015, Peer-reviwed
Symposium, English - Stochastic and equilibrium pictures of the ultracold Fano-Feshbach-resonance molecular conversion rate
Tomotake Yamakoshi; Shinichi Watanabe; Chen Zhang; Chris H. Greene
Physical Review A87 053604 (2013), 87, 053604 [11 pages], May 2013, Peer-reviwed
Scientific journal, English - Contrast oscillations of the Bose-Einstein-condensation-based atomic interferometer
Shinichi Watanabe; Shinnosuke Aizawa; Tomotake Yamakoshi
Phys. Rev. A, 85, 043621, 2012, Peer-reviwed
Scientific journal, English - Electron scattering and photoionization of one-electron diatomic molecules
Haruhide Miyagi; Toru Morishita; Shinichi Watanabe
Physical Review A, 85, 022708, 2012, Peer-reviwed
Scientific journal, English - Adiabatic theory of ionization of atoms by intense laser pulses: One-dimensional zero-range-potential model
O.I. Tolstikhin; T. Morishita; S. Watanabe
Physical Review A, 81, 033415 [27 pages], 2010, Peer-reviwed
Scientific journal, English - Slow Electrons Generated by Intense High-Frequency Laser Pulses
Koudai Toyota; Oleg I. Tolstikhin; Toru Morishita; Shinichi Watanabe
Physical Review Letters 103, 153003 (2009), 103, 153003 (4 pages), Oct. 2009, Peer-reviwed
Scientific journal, English - Numerical study of contrast degradation of BEC interferometers and countermeasures
Gopi Krishna; Masatoshi Umetsu; Chien-Nan Liu; Shinichi Watanabe
Journal of Physics: Conference Series, 185, 012012(1-4), Oct. 2009, Peer-reviwed
Scientific journal, English - Photoelectron interference fringes by super intense x-ray laser pulses
Koudai Toyota; Oleg I Tolstikhin; Toru Morishita; Shinichi Watanabe
Journal of Physics: Conference Series, 185, 012050(1-4), Oct. 2009, Peer-reviwed
Scientific journal, English - Numerical investigation of contrast degradation of Bose-Einstein-condensate interferometers
Chien-Nan Liu; G. Gopi Krishna; Masatoshi Umetsu; Shinichi Watanabe
Physical Review A, 79, 013606 (11 pages), 2009, Peer-reviwed
Scientific journal, English - Adiabatic theory of ionization of atoms by intense laser pulses
O. O. Tolstikhin; T. Morishita; S. Watanabe
Journal of Physics: Conference Series, 194, 032032, 2009, Peer-reviwed
Research society, English - Interference substructure of above-threshold ionization peaks in the stabilization regime
Koudai Toyota; Oleg I. Tolstikhin; Toru Morishita; Shinichi Watanabe
Physical Review, 78, 033432 (8 pages), Sep. 2008, Peer-reviwed
Scientific journal, English - Experimental Retrieval of Target Structure Information from Laser-Induced Rescattered Photoelectron Momentum Distributions
M. Okunishi; T. Morishita; G. Prümper; K. Shimada; C. D. Lin; S. Watanabe; K. Ueda
Physical Review Letters, 100, 14, 143001 (4 pages), 2008, Peer-reviwed
Scientific journal, English - Retrieving photorecombination cross sections of atoms from high-order harmonic spectra
Shinichirou Minemoto; Toshihito Umegaki; Yuichiro Oguchi; Toru Morishita; Anh-Thu Le; Shinichi Watanabe; Hirofumi Sakai
Physical Review A, 78, 061402(R) (4 pages), 2008, Peer-reviwed
Scientific journal, English - Attosecond Light Pulses for Probing Two-Electron Dynamics of Helium in the Time Domain
Toru Morishita; Shinichi Watanabe; C. D. Lin
Phys. Rev. Lett., 98, 083003 (4 pages), 2007, Peer-reviwed
Scientific journal, English - Two-dimensional electron momentum spectra of argon ionized by short intense lasers: Comparison of theory with experiment
Toru Morishita; Zhangjin Chen; Shinichi Watanabe; C. D. Lin
Phys. Rev. A, 75, 023407 (7 pages), 2007, Peer-reviwed
Scientific journal, English - Time-dependent hyperspherical studies for a two-dimensional attractive Bose-Einstein condensate
Chien-Nan Liu; Toru Morishita; Shinichi Watanabe
Phys. Rev. A, 75, 023604 (8 pages), 2007, Peer-reviwed
Scientific journal, English - Siegert-state expansion in the Kramers-Henneberger frame: Interference substructure of above-threshold ionization peaks in the stabilization regime
Koudai Toyota; Oleg I. Tolstikhin; Toru Morishita; Shinichi Watanabe
Physical Review A, 76, 4, 043418 (8 pages), 2007, Peer-reviwed
Scientific journal, English - Reexamination of dynamical stabilization of matter-wave solitons
Alexander Itin; Toru Morishita; Shinichi Watanabe
Physical Review A, 74, 033613 (12 pages), 2006, Peer-reviwed
Scientific journal, English - Vortex creation during magnetic trap manipulations of spinor Bose-Einstein condensates
A. P. Itin; T. Morishita; M. Satoh; O. I. Tolstikhin; S. Watanabe
Physical Review A, 73, 063615 (7 pages), 2006, Peer-reviwed
Scientific journal, English - Siegert pseudostate perturbation theory: One- and two-threshold cases
Koudai Toyota; Toru Morishita; Shinichi Watanabe
Physical Review A, 72, 062718 (8pages), Dec. 2005, Peer-reviwed
Scientific journal, English - Gyroscopic effects in interference of matter waves
Oleg I. Tolstikhin; Toru Morishita; Shinichi Watanabe
Phys. Rev. A, 72, 051603-1-051603-4, Nov. 2005, Peer-reviwed
Scientific journal, English - Pump-probe analysis of doubly excited states of He atom
T. Morishita; S. Watanabe; C.D. Li
International Seminar on Atomic Processes in Intense Laser Fields and Related Many-Body Phenomena, at Shonan, Japan, January 21-23, 2005, Abstract book,, 24, Jan. 2005
Research society, English - Collective excitation mode in the rotating asymmetric BEC of 87Rb
M. Matono; T. Morishita; S. Watanabe
International Seminar on Atomic Processes in Intense Laser Fields and Related Many-Body Phenomena, at Shonan, Japan, January 21-23, 2005, Abstract book, 62, Jan. 2005
Research society, English - The Effects of Rotation in Interference Experiments with BEC
O.I. Tolstikhin; T. Morishita; S. Watanabe
International Seminar on Atomic Processes in Intense Laser Fields and Related Many-Body Phenomena, at Shonan, Japan, January 21-23, 2005, Abstract book, 66, Jan. 2005
International conference proceedings, English - Aspects of hyperspherical adiabaticity in an atomic-gas Bose-Einstein condensate
D. Kushibe; M. Mutou; T. Morishita; S. Watanabe; M. Matsuzawa
Physical Review A, 70, 063617, 2004, Peer-reviwed
Scientific journal, English - Double-ionization of He by fast proton and antiproton impact
T Morishita; T Sasajima; S Watanabe; M Matsuzawa
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, ELSEVIER SCIENCE BV, 214, 144-148, Jan. 2004, Peer-reviwed, The hyperspherical L-2 basis set is used to represent the correlated two-electron continuum states of He. The collision with the fast proton or antiproton is thus rigorously treated by the time-dependent method. Inclusion of s and p states seems to almost fully account for the difference between proton-impact and antiproton-impact double ionization cross-sections. The total ionization cross-sections, on the other hand, are shown to coincide for both projectiles, indicating the complementary nature of the single and double ionization processes. (C) 2003 Elsevier B.V. All rights reserved.
Scientific journal, English - Two-channel Siegert pseudostate approach to a three-body Coulomb problem: S-wave resonances of Ps[sup -](N = 2,3)
Koudai Toyota; Shinichi Watanabe
Phys. Rev. A, 68, 062504, 2003, Peer-reviwed
Scientific journal, English - Survival probability of a truncated radial oscillator subject to periodic kicks
Seiichi Tanabe; Shinichi Watanabe; Farhan Saif; Michio Matsuzawa
Physical Review A, 65, 033420-1-033420-7, 2002, Peer-reviwed
Scientific journal, English - Truncated Radial Oscillator Subject to Peridic Kicks
Seiichi Tanabe; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 27, 95-97, 2002
Scientific journal, English - Two-Channel Siegert Pseudo-State: Study of Square-Well Potential
Koudai Toyoda; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 28, 103-104, 2002
Scientific journal, English - Hyperspherical Analysis of the Figure-Eight Solution of the Three-Body Problem
Takeshi Sasajima; Toru Morishita; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 28, 28, 95-96, 2002
Scientific journal, English - Numerical Calculation of Quantized Vortices in 2-Dimensional Bose-Einstein Condensates
Masaki Mutou; Toru Morishita; Daisuke Kushibe; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 28, 91-92, 2002
Scientific journal, English - Hyperspherical Adiabatic Treatment of Elementary Excitation in Dilute Gas Atomic Bose-Einstein Condensation
Daisuke Kushibe; Masaki Mutou; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 28, 28, 85-86, 2002
Scientific journal, English - Double Ionization of He Generated by Fast Proton and AntiProton Impact
Toru Morishita; Yuuichi Musha; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 28, 40-41, 2002
Scientific journal, English - Interaction Potentials between He atom and diatomic molecular ion
M. Hananoe; K. Ohtsuki; T. Morishta; S. Watanabe; M. Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 28, 28, 16-17, 2002
Scientific journal, English - Double Ionization by Fast Proton and Anti-proton Impact
Toru Morishita; Takeshi Sasajima; Shinichi Watanabe; Michio Matsuzawa
International Conference on Low Energy Antiproton Physics (LEAP'03) (Yokohama, Japan, March 3-7, 2003), Book of Abstracts, 46, 2002
International conference proceedings, English - Aspects of Adiabaticity in an Atomic BEC
Shinichi Watanabe
JSPS-NSF and Riken, Joint Workshop on Resonances in Physics, Chemistry and Biology (US-JAPAN Workshop)(December 18-20, 2002, Hayama, Japan), Book of Abstracts, 49-50, 2002
International conference proceedings, English - Siegert Pseudostates and Reflectionless Time-Propagation of Wave Packet
Shinichi Watanabe
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, Supplement 1, 2002
International conference proceedings, English - Interaction potentials between He atom and diatomic molecular ion
M. Hananoe; K. Ohtsuki; T. Morishita; S. Watanabe; M. Matsuzawa
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, 222-223, 2002
International conference proceedings, English - Two-channel Siegert Pseudo-State Method: Case of Square-Well Potential
Koudai Toyota; Shinichi Watanabe; Michio Matsuzawa
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, 2002
International conference proceedings, English - Numerical simulation of quantized vortices in 2-Dimensional Bose-Einstein Condensates
Masaki Mutou; Toru Morishita; Daisuke Kushibe; Shinichi Watanabe; Michio Matsuzawa
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, 202-203, 2002
International conference proceedings, English - Hyperspherical adiabatic treatment of atomic Bose-Einstein condensation
Daisuke Kushibe; Masaki Mutou; Shinichi Watanabe; Michio Matsuzawa
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, 200-201, 2002
International conference proceedings, English - Figure-Eight Solution of the Three-Body Problem in the Hyperspherical Coordinates
Takeshi Sasajima; Toru Morishita; Shinichi Watanabe; Michio Matsuzawa
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, 2002
International conference proceedings, English - Hyperspherical calculation of double ionization of He generated by fast proton and antiproton impact
Toru Morishita; Yuuichi Musha; Shinichi Watanabe; Michio Matsuzawa
The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), Book of Abstracts, 150-151, 2002
International conference proceedings, English - Siegert-pseudostate representation of quantal time-evolution: A harmonic oscillator kicked by periodic pulses
S.Tanabe; S.Watanabe; N.Sato; M.Matsuzawa; S; Yoshida; C.Reinhold; J.Burgdoerfer
Phys.Rev.A, 63, 052721-1-052721-11, 2001, Peer-reviwed
Scientific journal, English - Hyperspherical L2-integrable basis method for energetic proton and anti-proton impact autoionization
T. Morishita; K. Hino; T. Edamura; D. Kato; S. Watanabe; M. Matsuzawa
J. Phys. B: At. Mol. Opt. Phys. 34 L475-484, 34, L475-L484, 2001, Peer-reviwed
Scientific journal, English - 追悼文 「さようなら,Fano先生」
渡辺 信一
日本物理学会会誌, 56, 7, 533-534, 2001
Research society, Japanese - Antiprotonic helium and the hyperspherical elliptic coordinates
S Watanabe
PHYSICS ESSAYS, PHYSICS ESSAYS PUBLICATION, 13, 2-3, 389-393, Jun. 2000, Peer-reviwed, The hyperspherical elliptic coordinates method is described, and its specific application to metastable states of antiprotonic helium is discussed. A note on the role of the hyperradius in the parameterization of the ubiquitous breathing mode is given, employing the atomic Bose-Einstein condensate as a pedagogical example.
Scientific journal, English - Influence of short-range interaction on the ionization threshold
N. Miyashita; S. Watanabe; M. Matsuzawa; J. Macek
Phys. Rev. A 61, 61, 014901-1-014901-2, 2000, Peer-reviwed
Scientific journal, English - Hyperspherical L^2^ basis set approach to proton-impact ionization
K.Hino; T.Morishita; S.Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 26, 41-43, 2000
International conference proceedings, English - Quantum time-propagation using siegert pseudostates The case of a periodically kicked harmonic oscillator
Seiichi Tanabe; Shinichi Watanabe; Michio Matsuzawa
Progress Report of the Society for Atomic Collision Research in Japan, 26, 88-90, 2000
Scientific journal, English - Reflection-free propagation of wave packets
S Yoshida; S Watanabe; CO Reinhold; J Burgdorfer
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 60, 2, 1113-1123, Aug. 1999, Peer-reviwed, We analyze the problem of suppression of reflections within the numerical propagation of wave packets using finite atomiclike pseudostate expansions. Artificial reflections at effective "walls" and reentering of probability flux into the interaction region represents a major limitation for the study of long-time evolution of atomic ionization processes. We propose two methods, the repetitive projection method (RPM) and Siegert pseudostate (SPS) propagation, and study their efficiency in Suppressing reflections. It is shown that the quantum Zeno effect sets a limit on the efficiency of the RPM as well as of masking functions. For the exactly solvable propagation of a radial-free wave packet, we show that both the SPS and the RPM provide almost complete suppression of reflections without appreciable distortion in the physically relevant region of coordinate space. [S1050-2947(99)03908-6].
Scientific journal, English - Depletion of harmonic oscillator states by periodic kicks
N. Sato; S. Watanabe; M. Matsuzawa; S. Yoshida; C.O.Reinhold; J. Burgdoerfer
21st International Conference on the Physics of Electronic and Atomic Collisions（Sendai,Japan July22-27,1999）．Abstracts of Contributed Papers, eds. Y. Itikawa, K. Okuno, H. Tanaka, A. Yagishita and M. Matsuzawa, 158, Jul. 1999
International conference proceedings, English - Quantum effects and the role of the potential ridge in ionization threshold law
N. Miyashita; D. Kato; S. Watanabe; M. Matsuzawa; J. Macek
21st International Conference on the Physics of Electronic and Atomic Collisions（Sendai,Japan July22-27,1999）．Abstracts of Contributed Papers, eds. Y. Itikawa, K. Okuno, H. Tanaka, A. Yagishita and M. Matsuzawa, 247, Jul. 1999
International conference proceedings, English - Floquet analysis of the dynamical stabilization of the kicked hydrogen atom
S. Yoshida; C. O. Reinhold; P. Krist; J. Burgdorfer; S. Watanabe; F. B. Dunning
Phys. Rev. A59, 59, R4121-R4124, 1999, Peer-reviwed
Scientific journal, English - Quantum diffraction and thershold law for the Temkin-Poet model of electron-hydrogen ionization
Naoyuki Miyashita; Daiji Kato; Shinichi Watanabe
Phys. Rev. A59, 4385-4389, 1999, Peer-reviwed
Scientific journal, English - Double ionization of helium by energetic charged-particle impact
Y. Kawabata; K. Hino; S. Watanabe; M. Mitsuzawa
Sixth Europhysics Conference on Atomic and Molecular Physics（Siena, Italy 14-18 July 1998）．Europhysics Conference Abstract 4-81, 4-81, Jul. 1998
International conference proceedings, English - Noniterative Siegert-state approach to photoionization of an atom in a Stark-field
S. Watanabe; J. Burgdorfer
Program of the 1998 Division of Atomic, Molecular,and Optical physics Annual Meeting, Santa Fe, May 28, 1284, May 1998
International conference proceedings, English - Hyperspherical hierarchy of three-electron radial excitations
T Morishita; OI Tolstikhin; S Watanabe; M Matsuzawa
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 56, 5, 3559-3568, Nov. 1997, Peer-reviwed, We investigate hierarchical representation of three-electron radial excitations, relying on the replacement of a sequence of ordered individual electron radial coordinates by a hierarchical sequence of hyperspherical radial variables. In the spirit of the hyperspherical method we argue that the latter variables allow adiabatic quasiseparability of the three-electron wave function. We examine this by approximately evaluating hyperspherical adiabatic potential curves and channel functions for the Li(s(3)) configuration. The hierarchical representation permits one to display manifold aspects of the triply excited states with a pair of radial quantum numbers. [S1050-2947(97)02011-8].
Scientific journal, English - Ab initio study of interelectronic correlations in electron-impact ionization of hydrogen
D Kato; S Watanabe
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 56, 5, 3687-3700, Nov. 1997, Peer-reviwed, Electron-impact ionization of hydrogen is investigated based upon ab initio quantal calculations. In the present calculations, strong interelectronic correlations are represented by the hyperspherical channel functions and accurate numerical solutions of the two-electron atomic Schrodinger equation are obtained by means of the smooth-variable-discretization method in combination with the R-matrix propagation method. The double-continuum boundary condition is represented by matching the numerical solutions to asymptotic solutions, which are described by superpositions of approximate asymptotic channel functions. We obtained the ionization threshold law, which is in good agreement with Wannier's conjecture, and also an almost uniform energy distribution in double-continuum states at low energies, say similar to 0.1 a.u. At low energies, the angular distributions of the electrons in double-continuum states of S-1(e) localize where the interelectronic angular distance theta(12)=pi. As the energy increases, the binary-encounter and the dipolelike transition mechanisms manifest themselves in the angular distribution. The spin-averaged total ionization cross section and the spin asymmetry from the present method agree well with experimental measurements as well as the convergent-close-coupling result, while for the spin asymmetry there is a noticeable disagreement with the hidden-crossing result at moderately low energies. An essential role of the potential ridge during the ionization process is apparent in the convergence of the present calculations. [S1050-2947(97)02611-5].
Scientific journal, English - Elimination of hyperspherical ghost states caused by a closed-shell core: Test with the restricted Temkin-Poet model
S Watanabe; T Ebara
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 55, 1, 175-182, Jan. 1997, Peer-reviwed, Ghost states arise in applications of the hyperspherical close-coupling method to atoms with two valence electrons outside a closed-shell core. A rigorous formulation of ghost-state elimination is proposed on the basis of a projection operator. Its practical implementation exploits the R-matrix propagator. The procedure is tested for the Temkin-Poet s(2) model by removing a target orbital regarded as an occupied core state. The partial success of the recently proposed scheme of Zhou and Lin [Phys. Rev. A 51, 1286 (1995)] is accounted for as due to an extreme insensitivity of the R-matrix states on the projection parameter.
Scientific journal, English - Metastable states of antiprotonic helium in the energy range of the 2S and 2P states of helium: Hyperspherical analysis of the system
Oleg I. Tolstikhin; Shinichi Watanabe; Michio Matsuzawa
Physical Review A, American Physical Society, 54, R3705-R3709, 01 Nov. 1996, Peer-reviwed
Scientific journal, English - Proton-antiproton impact electron emission spectra of He: Comparison of theory with experiment
T Morishita; KI Hino; S Watanabe; M Matsuzawa
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 53, 4, 2345-2358, Apr. 1996, Peer-reviwed, We study electron emission cross sections of He decaying to He+(1s) in the N=2 and 3 manifolds produced by fast proton and antiproton impact. Ab initio close-coupling calculations are carried out using the impact-parameter method. The electronic state during collision is expanded in terms of He wave functions obtained by the hyperspherical close-coupling method. The theory reproduces experimental findings regarding both the background and doubly excited resonances well. The resonance shapes are found to depend sensitively on the sign of the projectile charge. This is due to interference between the partial waves of the ejected electron. We analyze excitation paths that eventually lead to another interference effect between continuum and doubly excited states. We demonstrate importance of both the bound and continuum states as intermediate states.
Scientific journal, English - Hyperspherical Elliptic Coordinates and Three-Body Coulomb Problem
Oleg I. Tolstikhin; Shinichi Watanabe; Michio Matsuzawa
Physical Review Letters, American Physical Sosciety, 74, 3573-3576, 01 May 1995, Peer-reviwed
Scientific journal, English - Two-Electron Correlations in e+H→e+e+p Near Threshold
Daiji Kato; Shinichi Watanabe
Physical Review Letters, American Physical Society, 74, 2443-2446, 27 Mar. 1995, Peer-reviwed
Scientific journal, English - CRITICAL-STUDY OF PHOTODETACHMENT OF H- AT ENERGIES UP TO THE N=4 THRESHOLD
JZ TANG; Y WAKABAYASHI; M MATSUZAWA; S WATANABE; SHIMAMURA, I
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 49, 2, 1021-1028, Feb. 1994, Peer-reviwed, We apply the close-coupling method in terms of the hyperspherical coordinates;to the two-electron system H-. A two-dimensional matching procedure is used to connect the close-coupling wave function to an independent-electron wave function in the asymptotic region. The latter is described as the wave function of a detached electron moving in a dipole potential field of the neutral hydrogen atom. The total photodetachment cross sections and the partial cross sections for the production of the H atoms in different states n are calculated up to the n=4 hydrogenic threshold. The results obtained in the length and acceleration forms agree within about three significant figures. The magnitude and shape of the P-1 degrees shape resonance just above the n=2 threshold are found to depend sensitively on the initial-state wave function. This appears to be one of the reasons for a disparity among the cross sections in the literature. The present result improves greatly on the existing computational results. The relative magnitudes of the,partial cross sections for the production of H (n=1,2,3) atoms below the n=4 threshold are substantially different from the only previous results of the eigenchannel R-matrix calculations [H. R. Sadeghpour, C. H. Greene, and M. Cavagnero, Phys. Rev. A 45, 1587 (1992)]. The present results on both partial and total cross sections are in excellent agreement with experiments.
Scientific journal, English - VERY NARROW DOUBLY-EXCITED 2(1,0)-N AND 2(-1,0)0N P-1(O) STATES OF HELIUM
JZ TANG; S WATANABE; M MATSUZAWA
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 48, 1, 841-844, Jul. 1993, Peer-reviwed, We present a detailed theoretical study of the very narrow A = - and A = 0 series seen in the recently reported high-resolution photoionization spectrum of He below the N = 2 threshold [M. Domke et al., Phys. Rev. Lett. 69, 1171 (1992)]. The hyperspherical close-coupling method combined with the multichannel quantum-defect theory is used and the photoionization cross section has been calculated over a wide energy range with high efficiency. Our results are in excellent agreement with the experimental data and compare favorably with recent accurate theoretical works.
Scientific journal, English - A hyperspherical close-coupling calculation of photoionization from the He atom, Li+ and C4+ ions. I. Below the N=2 threshold
B Zhou; C D Lin; J -Z Tang; S Watanabe; M Matsuzawa
Journal of Physics B, The Institute of Physics (IOP) Science, 26, 2555-2573, 1993, Peer-reviwed
Scientific journal, English - DIPOLE DENSITY-FUNCTION AND EVALUATION OF THE OSCILLATOR STRENGTH OF HE
JZ TANG; S WATANABE; M MATSUZAWA
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 46, 7, 3758-3761, Oct. 1992, Peer-reviwed, The previously reported hyperspherical close-coupling method is extended to treat dipole transitions. In so doing, we introduce the dipole density function, which permits us to visualize various components of the dipole matrix as a function of the hyperradius and to study the convergence rate of the length and acceleration forms. In the adiabatic approximation, the acceleration form is shown to be always inferior to the length form regardless of the quality of the adiabatic wave function. We present detailed comparisons with other high-precision theoretical results for the bound-bound process He(1sns) + hnu --> He(1 smp). Excellent agreement between theory and experiment is attained for the photoionization of He above the He+(1s) threshold.
Scientific journal, English - Evidence of an excited angular correlation mode in high-lying He**
Jian-Zhi Tang; Shinichi Watanabe; Michio Matsuzawa; C. D. Lin
Physical Review Letters, American Physical Society, 69, 1633-1636, 14 Sep. 1992, Peer-reviwed
Scientific journal, English - General computational method for two-electron systems
Jian-zhi Tang; Shinichi Watanabe; Michio Matsuzawa
Physical Review A, American Physical Society, 46, 2437-2444, 02 Sep. 1992, Peer-reviwed
Scientific journal, English - DIAMAGNETIC RYDBERG ATOMS AND NEGATIVE-ENERGY COULOMB FUNCTIONS
S WATANABE; Y HOSODA; HA KOMINE
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 46, 5, 2693-2699, Sep. 1992, Peer-reviwed, The complicated quadratic Zeeman spectrum in a laboratory magnetic field is analyzed with the aid of accurate Coulomb functions. Different Rydberg manifolds are masked by the generalized Gailitis average based on the multichannel quantum-defect theory. Fundamental resonances are thereby accentuated. An efficient and reliable numerical procedure is developed for evaluating the negative-energy Coulomb functions and their derivatives. The method is based on the three-term recursions and employs Steed's forward-propagation method [A.R. Barnett et al., Comput. Phys. Commun. 8, 377 (1974)] as well as the backward-propagation method of Stegun and Abramowitz [Phys. Rev. 98, 1851 (1955)].
Scientific journal, English - ADIABATIC-EXPANSION METHOD APPLIED TO DIAMAGNETIC RYDBERG ATOMS
S WATANABE; H KOMINE
PHYSICAL REVIEW LETTERS, AMERICAN PHYSICAL SOC, 67, 23, 3227-3230, Dec. 1991, Peer-reviwed, We report on a successful implementation of the diabatic-by-sector method as applied to the computation of positive-energy diamagnetic Rydberg spectra of the alkali-metal atoms in a laboratory field (approximately 6 T). The method provides the quantum-defect parameters directly, and opens up the possibility of accounting for various spectral features quantum mechanically.
Scientific journal, English - GRANDPARENT MODEL OF THE DOUBLY-EXCITED HE-]] RESONANCES FROM A HYPERSPHERICAL VIEWPOINT
M LEDOURNEUF; S WATANABE
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, IOP PUBLISHING LTD, 23, 19, 3205-3224, Oct. 1990, Peer-reviwed
Scientific journal, English - QUANTUM-CLASSICAL CORRESPONDENCE AND THE NODAL COORDINATES IN THE QUADRATIC ZEEMAN PROBLEM
S WATANABE
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 39, 1, 417-420, Jan. 1989, Peer-reviwed
Scientific journal, English - R-MATRIX CALCULATION OF EIGENCHANNEL MULTICHANNEL QUANTUM DEFECT PARAMETERS FOR STRONTIUM
M AYMAR; E LUCKOENIG; S WATANABE
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, IOP PUBLISHING LTD, 20, 17, 4325-4345, Sep. 1987, Peer-reviwed
Scientific journal, English - KUMMER-FUNCTION REPRESENTATION OF RIDGE TRAVELING WAVES
S WATANABE
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 36, 4, 1566-1574, Aug. 1987, Peer-reviwed
Scientific journal, English - CLASSIFICATION SCHEME OF TRIPLY EXCITED-STATES FROM A MOLECULAR VIEWPOINT
S WATANABE; CD LIN
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 36, 2, 511-522, Jul. 1987, Peer-reviwed
Scientific journal, English - DOUBLE RYDBERG FORMULA AND APPLICATIONS TO DOUBLY EXCITED-STATES OF HIGHLY CHARGED IONS
CD LIN; S WATANABE
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 35, 11, 4499-4504, Jun. 1987, Peer-reviwed
Scientific journal, English - Nodal coordinates for the first-order quadratic Zeeman effect
S Watanabe; P; F O'Mahony
Journal of Physics B, IOP Science, 20, 223-234, 1987, Peer-reviwed
Scientific journal, English - DEMONSTRATION OF MOLECULE-LIKE MODES OF DOUBLY EXCITED-STATES IN HYPERSPHERICAL COORDINATES
S WATANABE; CD LIN
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 34, 2, 823-837, Aug. 1986, Peer-reviwed
Scientific journal, English - MULTICHANNEL PHOTODETACHMENT THEORY REVISITED FROM THE HYPERSPHERICAL VIEWPOINT
S WATANABE
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, IOP PUBLISHING LTD, 19, 11, 1577-1594, Jun. 1986, Peer-reviwed
Scientific journal, English - Channel coupling in the 1De spectrum of beryllium
P F O'Mahony; S Watanabe
Journal of Physics B, IOP Science, 18, L239-L244, 1985, Peer-reviwed
Scientific journal, English - SPIN CORRELATIONS IN PHOTODETACHMENT
S WATANABE; U FANO; CH GREENE
PHYSICAL REVIEW A, AMER PHYSICAL SOC, 29, 1, 177-182, 1984, Peer-reviwed
Scientific journal, English - DOUBLY EXCITED-STATES OF THE HELIUM NEGATIVE-ION
S WATANABE
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 25, 4, 2074-2098, 1982, Peer-reviwed
Scientific journal, English - ATOMIC POLARIZABILITY IN NEGATIVE-ION PHOTODETACHMENT
S WATANABE; CH GREENE
PHYSICAL REVIEW A, AMERICAN PHYSICAL SOC, 22, 1, 158-169, 1980, Peer-reviwed
Scientific journal, English
MISC
- （新著紹介）Ultracold Atoms in Optical Lattices: Simulating Quantum Many-Body Systems
渡辺 信一
Sep. 2014, 日本物理学会誌, 69, 655-655, Japanese, Book review - The Many-Body Landau-Zener Problem in Cold Molecular Formation and Dissociation
Shinichi Watanabe; Alexander P. Itin
By resonantly associating laser-cooled atoms, it is now possible to produce diatomic molecules referred to as Fano-Feshbach molecules. The absolute ground state of a polar molecule having been achieved with the Fano-Feshbach molecule as a seed, the coldmolecule production, owing to its groundbreaking opportinities, is attracting much attention. However, the molecular production takes place amongst many ultracold atoms, thus necessitating the examination of the many-particle effect. We present how the behavior based on the famous two-state Landau-Zener formula for the "atom+atom" and "diatom" states gets modified due to the nonlinear dynamics of many atoms which tends to soften the adiabaticity., The Physical Society of Japan (JPS), Jan. 2011, 日本物理学会誌, 66, 1, 42-45, Japanese, Peer-reviwed, Introduction other, 0029-0181, 110008006971, AN00196952
Books and other publications
- Frontiers in Optical Science 2
Japanese, Editor, 強光子場科学研究懇談会, Sep. 2009 - Frontiers in Optical Science
Japanese, Editor, 強光子場科学研究懇談会, Aug. 2005 - Atoms in Static Electric and Magnetic Fields
Shinichi Watanabe
English, Joint work, "Review of Fundamental Processes and Applications of Atoms and Ions" ed. C.-D. Lin, 1993
Lectures, oral presentations, etc.
- （一般シンポジウム講演）高温から低温に至る原子と光の物理と計算
渡辺 信一
Oral presentation, Japanese, 第74回日本物理学会年次大会, Domestic conference
16 Mar. 2019 - 長時間MDシミュレーションを用いたHsp90と中分子薬の結合機構の提案
松倉里沙; 望月和人; 古江祐也; 宮下尚之; 瀧真澄; 渡辺信一
Oral presentation, Japanese, 第74回日本物理学会年次大会, 日本物理学会, 九州大学伊都キャンパス, Domestic conference
15 Mar. 2019 - 1次元二色光格子中での光格子パルスを用いた冷却ボーズ原子波束の選択的励起
山越 智健; 渡辺 信一
Oral presentation, Japanese, 日本物理学会 2018年秋季大会, Domestic conference
09 Sep. 2018 - Selective inter-band transition by pulse sequences in 1D bichromatic Bose lattices
T. Yamakoshi; S. Watanabe
Poster presentation, English, 26th International Conference on Atomic Physics, International conference
23 Jul. 2018 - 振幅変調された光格子および調和トラップ中での安定な回帰波束
山越智健; 渡辺信一
Oral presentation, Japanese, 日本物理学会 2017年秋季大会, Domestic conference
Sep. 2017 - Quantum revivals of ultracold atomic wave packets in an amplitude-modulated parabolic optical lattice
T. Yamakoshi; S. Watanabe
Poster presentation, English, The 24th Congress of the International Commission for Optics, International conference
Aug. 2017 - Quantum revivals in amplitude modulated lattices
T. Yamakoshi; S. Watanabe
Poster presentation, English, ICOLS 2017 - International Conference on Laser Spectroscopy, International conference
Jul. 2017 - Exact and semiclassical fermion dynamics in amplitude modulated lattices
Tomotake Yamakoshi; Shinichi Watanabe; Shun Ogoda; Alexander P. Itin
Poster presentation, English, The 25th International Conference on Atomic Physics (ICAP2016), International conference
24 Jul. 2016 - アノマーＤＮＡによるアプタマー形成の理解と応用へ向けて
万邦曼; 山越智健; 渡辺信一
Poster presentation, Japanese, 台13回ＡＭＯ討論会, ＡＭＯ討論会実行委員会, 理化学研究所, http://www.atmos.jp/index.html, 15基のＤＮＡの結合によって血液の凝結を阻害する薬剤を作ることができる。この類の薬剤をアプタマーと呼ぶが本研究ではアノマリックなＤＮＡを用いることによって、アプタマーの機能の詳細を研究する。, Domestic conference
07 Jun. 2016 - ２色光格子によるスピン偏極フェルミ原子の操作
高山雄基; 山越智健; 大古田駿; 渡辺信一
Poster presentation, Japanese, 第13回AMO討論会, ＡＭＯ討論会実行委員会, 理化学研究所, http://www.atmos.jp/2016/index.html, 2色のレーザーを用いて光格子を組むことで、１色の光格子の振幅変調だけでは励起できないバンドへの遷移が可能となることを示した。, Domestic conference
03 Jun. 2016 - 光格子および調和トラップ中での偏極フェルミ原子気体におけるホールダイナミクス
山越智健; 大胡田駿; Alexander Itin; 渡辺信一
Oral presentation, Japanese, 日本物理学会第７１回年次大会, 日本物理学会, 東北学院大学泉キャンパス, Domestic conference
20 Mar. 2016 - 光格子および調和トラップ中での冷却ボーズ原子励起波束の生成と安定性
山越智健; 渡辺信一
Oral presentation, Japanese, 日本物理学 第７０回会年次, 日本物理学会, 早稲田大学, Domestic conference
21 Mar. 2015 - 光格子の振幅変調による極低温フェルミ原子ガスにおけるホールダイナミクス
大古田駿; 山越智健; 渡辺信一
Oral presentation, Japanese, 日本物理学会 第７０回年次大会, 日本物理学会, 早稲田大学, Domestic conference
21 Mar. 2015 - Interference substructure in photoelectron spectrum of one-electron negative ion in the stabilization regime
Shinichi Watanabe
Invited oral presentation, English, International Scientific Spring 2015, Invited, National Center for Physics, Islamabad, Pakistan, http://www.ncp.edu.pk/iss-2015.php, International conference
16 Mar. 2015 - Non-interacting ultracold atoms in amplitude modulated parabolic optical lattice
Shinichi Watanabe
Keynote oral presentation, English, International Scientific Spring 2015, Invited, National Center for Physics, Islamabad, Pakistan, http://www.ncp.edu.pk/iss-2015.php, International conference
16 Mar. 2015 - 光格子および調和トラップ中の冷却原子のダイナミクス
山越 智健; Alexander Itin; 渡辺 信一
Oral presentation, Japanese, 第69回物理学会年次大会, 日本物理学会, 東海大学（湘南キャンパス）, レーザー光によってできる光格子と調和ポテンシャル内にある極低温原子の重心運動を制御し、バンド励起を起こさせる。このときの波束の運動を数値的に分析する。, Domestic conference
27 Mar. 2014 - 緩く結合した３原子系の束縛エネルギースケーリング因子
伴 修; 渡辺 信一
Oral presentation, Japanese, 第69回物理学会年次大会, 日本物理学会, 東海大学（湘南キャンパス）, Efimov状態のエネルギースケーリングを３粒子の質量比が異なる場合について一般的に吟味した。高精度の数値計算技術を活用した。, Domestic conference
27 Mar. 2014 - Statistical evaluation of the ultracold molecular formation rate
Tomotake Yamakoshi; Chen Zhang,Chris H. Greene; Shinichi Watanabe
Invited oral presentation, English, Deutsche Physikalische Gesellschaft, Deutsche Physikalische Gesellschaft, Berlin, 極低温原子対から極低温分子を生成する場合の生成率をstochastic な統計的手法で求めた。特にBEC転移温度近傍での振舞を詳細に吟味した。, International conference
Mar. 2014 - 光格子および調和トラップ中の冷却原子のダイナミクス
山越 智健; Alexander Itin; 渡辺 信一
Poster presentation, Japanese, 第３８回原子衝突学会, 原子衝突学会, 理化学研究所（和光）, http://www.atomiccollision.jp/conference/conference.html, レーザー光によってできる光格子と調和ポテンシャル内にある極低温原子の重心運動を制御し、バンド励起を起こさせる。このときの波束の運動を数値的に分析する。, Domestic conference
16 Nov. 2013 - バンド励起された光格子中Fermi粒子のダイナミクス
山越 智健; 渡辺 信一
Poster presentation, Japanese, 第１０回ＡＭＯ討論会, ＡＭＯ討論会実行委員会, 電気通信大学, http://www.atmos.jp/, レーザー光によってできる光格子の振幅を制御することで極低温フェルミ原子の重心運動を制御し、バンド励起を起こさせる。このときの波束の運動を数値的に分析する。, Domestic conference
Jun. 2013 - Fano-Feshbach 共鳴分子生成率の温度依存性についてのモンテカルロシミュレーション
山越智健; Chen Zhang、Chris Greene; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,第６６回年次大会
Mar. 2011 - 扁長楕円体座標を用いた２原子分子の光イオン化過程の精密計算
宮城晴英; 森下亨; 渡辺信一; Oleg I. Tolstikhin
Oral presentation, Japanese, 日本物理学会講演概要集,第６６回年次大会
Mar. 2011 - 高強度レーザーパルスによる1次元ポジトロニウム負イオンの電離
黄緒明; 宮城晴英; 森下亨; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学会第６６回年次大会
Mar. 2011 - BEC原子干渉計と原子間相互作用の影響
梅津匡亨; Chien-Nan Liu; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集 第６４巻 第１号 第２分冊,日本物理学会 第６４回年次大会
Mar. 2009 - 高強度真空紫外レーザーパルスによる水素原子陰イオンの光電子スペクトル
豊田広大; Oleg I. Tolstikhin; 森下亨; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集 第６４巻 第１号 第２分冊,日本物理学会 第６４回年次大会
Mar. 2009 - Siegert境界条件を用いた波束もむ反射時間発展
豊田広大; 森下亨; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学会２００７年春季大会
Mar. 2007 - 極低温ヘリウムガス中での重いイオンの移動度
福田利恵子; 大槻一雅; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学会２００７年春季大会
Mar. 2007 - Theory of Nonlinear STIRAP and nonadiabatic dynamics of nonlinear three-state models
A.P.Itin; S. Watanabe
Oral presentation, English, 日本物理学会講演概要集,日本物理学会２００７年春季大会
Mar. 2007 - トラップされたＢＥＣを用いた干渉計の数値シミュレーション
室山史樹; G.Gopi Krishna; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学２００７年春季大会
Mar. 2007 - 超精密計測が拓く原子・分子・光（AMO）科学の最前線
渡辺 信一
Oral presentation, Japanese, 物理学会,第６１回年次大会
Mar. 2006 - Transport in nonlinear Hamiltonian systems and BEC dynamics in unstable regions
A. P. Itin; T. Morishita; S. Watanabe
Oral presentation, English, 物理学会,第６１回年次大会
Mar. 2006 - アト秒光パルスによる He の電子相関の実時間分析と制御
森下亨; 渡辺信一
Oral presentation, Japanese, 物理学会,第６１回年次大会
Mar. 2006 - Adiabatic phases and adiabatic invariants in coherent manipulation of matter-waves
A.P.Itin; S. Watanabe
Oral presentation, English, 日本物理学会講演概要集,日本物理学会２００６年秋季大会
Mar. 2006 - Ab initio calculation of double ionizaion cross section of He by fast proton and antiproton impact
T. Morishita; T. Sasajima; S.Watanabe; M. Matsuzawa
Public symposium, English, 6th Asian International Seminar on Atomic and Molecluar Physics, 6th Asian International Seminar on Atomic and Molecluar Physics, Beijing, China
Sep. 2005 - Dynamical stabilization of matter-wave solitons revisited
Alexander Itin; Toru Morishita; Shinichi Watanabe
Oral presentation, English, 日本物理学会講演概要集,日本物理学会２００５年秋季大会
Sep. 2005 - アト秒光パルスによるHeの２電子励起状態からの２重イオン化
森下亨; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学会２００５年秋季大会
Sep. 2005 - アト秒レーザーパルスによる原子内電子波束の実時間分析
森下亨; 渡邊信一
Oral presentation, Japanese, 原子衝突研究協会第30回研究会講演概要集
Aug. 2005 - 時間に依存する量子系の数理
渡邊信一; 大槻一雅; 森下亨; A. Itin; O.I. Tolstikhin; 豊田広大
Oral presentation, Japanese, AMO討論会 18-19/6/05
Jun. 2005 - アト秒光パルスによるHeの2電子励起状態の集団運動モードの実時間分析
森下亨; 渡邊信一
Oral presentation, Japanese, 日本物理学会講演概要集
Mar. 2005 - 回転する非等方的ＢＥＣの素励起
的野政志; 森下亨; 渡邊信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学会第６０回年次大会
Mar. 2005 - 回転する非等方的ＢＥＣの素励起
的野政志; 森下亨; 渡邊信一
Oral presentation, Japanese, 日本物理学会講演概要集,日本物理学会第６０回年次大会
Mar. 2005 - アト秒光パルスによるHeの2電子励起状態の集団運動モードの実時間分析
森下亨; 渡邊信一
Oral presentation, Japanese, 日本物理学会講演概要集
Mar. 2005 - Time-resolved spectroscopy of doubly excited states of He
T. Morishita; S. Watanabe; C. D. Lin
Public symposium, English, 6th Asian International Seminar on Atomic and Molecluar Physics, 6th Asian International Seminar on Atomic and Molecluar Physics, Beijing, China
Sep. 2004 - Elementary Excitations of an Atomic BEC --- From low-energy oscillations to the Tkachenko mode
M. Matono; T. Morishita; S. Watanabe
Public symposium, English, 6th Asian International Seminar on Atomic and Molecluar Physics, 6th Asian International Seminar on Atomic and Molecluar Physics, Beijing, China
Sep. 2004 - アト秒光パルスによるHeの2電子励起状態の実時間分析の試み
森下亨; 渡邊信一
Oral presentation, Japanese, 日本物理学会,日本物理学会講演概要集，第５９巻，第２号，第２分冊
Sep. 2004 - Time-dependent Hyperspherical Close-Coupling Method for time-resolved spectroscopy of doubly excited states of atoms
T. Morishita; S. Watanabe; C. D. Lin
Public symposium, English, Physical Chemistry Colloquim on ultrafast and intense-field phenomena, 6th Asian International Seminar on Atomic and Molecluar Physics, Sendai,
Aug. 2004 - 時間に依存する手法による量子系の数理
的野政志; 横尾観周; 櫛部大介; 森下亨; 大槻一雅; 渡邊信一
Oral presentation, Japanese, AMO討論会 7-10/8/04
Jul. 2004 - 陽子及び反陽子衝撃によるHe原子の２重イオン化の放出電子スペクトル
笹島豪; 森下亨; 渡邊信一; 松澤通生
Oral presentation, Japanese, 日本物理学会,日本物理学会講演概要集，第５９巻，第１号，第２分冊
Mar. 2004 - 2成分系 Bose-Einstein 凝縮体の超球座標近似による解析
武藤雅基; 森下亨; 渡邊信一; 松澤通生
Oral presentation, Japanese, 日本物理学会,日本物理学会講演概要集，第５９巻，第１号，第２分冊
Mar. 2004 - 超球座標法による引力型ＢＥＣの崩壊過程の解析
石村洋志; 櫛部大介; 渡辺信一
Oral presentation, Japanese, 日本物理学会講演概要集,第５９回年次大会
Mar. 2004 - 超球座標部分波展開法を用いた電子衝撃による水素原子の イオン化過程の計算
片井隆志; 森下亨; 渡邊信一; 松澤 通生
Oral presentation, Japanese, 日本物理学会５７回年次大会講演概要集, Domestic conference
Mar. 2002 - 周期的光パルスによる調和振動子の励起と量子・古典対応
渡邊信一; 田名部 誠一; 松澤 通生
Oral presentation, Japanese, 日本物理学会５７回年次大会講演概要集, Domestic conference
Mar. 2002 - 陽子及び反陽子衝撃による He 原子の二重イオン化
武捨 悠一; 森下 亨; 渡邊信一; 松澤通生
Oral presentation, Japanese, 日本物理学会５７回年次大会講演概要集, Domestic conference
Mar. 2002 - Double Ionization by Fast Proton and Anti-proton Impact
Toru Morishita; Takeshi Sasajima; Shinichi Watanabe; Michio Matsuzawa
Invited oral presentation, English, International Conference on Low Energy Antiproton Physics (LEAP'03) (Yokohama, Japan, March 3-7, 2003), International conference
2002 - Aspects of Adiabaticity in an Atomic BEC
Shinichi Watanabe
Invited oral presentation, English, JSPS-NSF and Riken, Joint Workshop on Resonances in Physics, Chemistry and Biology (US-JAPAN Workshop)(December 18-20, 2002, Hayama, Japan), International conference
2002 - Siegert Pseudostates and Reflectionless Time-Propagation of Wave Packet
Shinichi Watanabe
Invited oral presentation, English, The Fifth Asian International Seminar on Atomic and Molecular Physics (Nara, Japan, 2-5 October, 2002), International conference
2002 - 周期的半サイクルパルスキックによる調和振動子の励起
田名部誠一; 渡邊信一; 松澤通生
Oral presentation, Japanese, 日本物理学会56回大会（中央大学多摩）, 28pZF-12
Mar. 2001 - Time Propagation: Masking method v.s. Siegert expansion method
田名部誠一; 渡邊信一; 松澤通生
Oral presentation, English, 原子衝突研究協会第5回研究会（岡崎コンフェレンスセンター, 8月29日-31日）講演概要集, Domestic conference
Aug. 2000 - 中空原子の理論的考察
高橋 淳; 大槻一雅; 渡辺信一; 松澤通生
Oral presentation, Japanese, 原子衝突研究協会第25回研究会（岡崎）, Domestic conference
Aug. 2000 - イオン化状態におけるポテンシアルの形状と量子効果
宮下尚之; 加藤大治; 渡邊信一; 松澤通生
Oral presentation, Japanese, 日本物理学会54回年会（広島,1999年3月28日-31日）講演概要集
Mar. 1999 - Depletion of quantum states induced by periodic half-cycle pulses or kicks
佐藤直樹; 渡邊; 松澤通生; S. Yosida; C. O. Reinhold; J. Burgdorfer
Oral presentation, English, 日本物理学会54回年会（広島 1999年3月28日-31日）講演概要集, Domestic conference
Mar. 1999 - 超球座標法における原子系BECの行列要素の評価
櫛部大介; 渡邊信一; 森下 亨; 松澤通生
Oral presentation, Japanese, 日本物理学会春の分科会25aF12 日本物理学会概要集, Domestic conference
1999
Courses
- アカデミックリタラシー
The University of Electro-Communications - アカデミックリタラシー
The University of Electro-Communications - 先端トピックス
The University of Electro-Communications - 先端トピックス
電気通信大学 - 量子力学第二演習
The University of Electro-Communications - 量子物理工学基礎
The University of Electro-Communications - 量子物理工学基礎
The University of Electro-Communications - Fundamentals of Quantum Physics
The University of Electro-Communications - 量子物理工学基礎
電気通信大学