• 852 Citations
  • 15 h-Index
1981 …2019

Research output per year

If you made any changes in Pure these will be visible here soon.

Research Output

  • 852 Citations
  • 15 h-Index
  • 70 Article
  • 4 Comment/debate
  • 1 Conference contribution
Filter
Article
2019

Dynamical Properties of the Finite-size Dicke Model Coupled to a Thermal Reservoir

Imai, R. & Yamanaka, Y., 2019 Jan 1, In : Journal of the Physical Society of Japan. 88, 2, 024401.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2018

Bose-Einstein condensation of α clusters and new soft mode in C 12 - Fe 52 4N nuclei in a field-theoretical superfluid cluster model

Katsuragi, R., Kazama, Y., Takahashi, J., Nakamura, Y., Yamanaka, Y. & Ohkubo, S., 2018 Oct 3, In : Physical Review C. 98, 4, 044303.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Stability of symmetry breaking states in finite-size Dicke model with photon leakage

Imai, R. & Yamanaka, Y., 2018 Nov 23, In : Physics Letters, Section A: General, Atomic and Solid State Physics. 382, 46, p. 3333-3338 6 p.

Research output: Contribution to journalArticle

2017

Thermal and quantum fluctuations of confined Bose–Einstein condensate beyond the Bogoliubov approximation

Nakamura, Y., Kawaguchi, T., Torii, Y. & Yamanaka, Y., 2017 Jan 1, In : Annals of Physics. 376, p. 484-498 15 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2016
3 Citations (Scopus)

Effective field theory of Bose-Einstein condensation of α clusters and Nambu-Goldstone-Higgs states in C 12

Nakamura, Y., Takahashi, J., Yamanaka, Y. & Ohkubo, S., 2016 Jul 19, In : Physical Review C. 94, 1, 014314.

Research output: Contribution to journalArticle

10 Citations (Scopus)
2015
1 Citation (Scopus)
2014

Dynamical instability induced by the zero mode under symmetry breaking external perturbation

Takahashi, J., Nakamura, Y. & Yamanaka, Y., 2014 Aug, In : Annals of Physics. 347, p. 250-260 11 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
8 Citations (Scopus)
2013

From classical mechanics with doubled degrees of freedom to quantum field theory for nonconservative systems

Kuwahara, Y., Nakamura, Y. & Yamanaka, Y., 2013 Dec 9, In : Physics Letters, Section A: General, Atomic and Solid State Physics. 377, 43, p. 3102-3105 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

From superoperator formalism to nonequilibrium Thermo Field Dynamics

Nakamura, Y. & Yamanaka, Y., 2013 Apr 1, In : Annals of Physics. 331, p. 51-69 19 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2011

Canonical quantization for a relativistic neutral scalar field in non-equilibrium thermo field dynamics

Mizutani, Y., Inagaki, T., Nakamura, Y. & Yamanaka, Y., 2011 Oct 1, In : Progress of Theoretical Physics. 126, 4, p. 681-701 21 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)
1 Citation (Scopus)
2 Citations (Scopus)
5 Citations (Scopus)
2010

Derivation of non-Markovian transport equations for trapped cold atoms in nonequilibrium thermal field theory

Nakamura, Y., Sunaga, T., Mine, M., Okumura, M. & Yamanaka, Y., 2010 Feb 1, In : Annals of Physics. 325, 2, p. 426-441 16 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2009

Analytical study of the splitting process of a multiply-quantized vortex in a Bose-Einstein condensate and collaboration of the zero and complex modes

Kobayashi, K., Nakamura, Y., Mine, M. & Yamanaka, Y., 2009 Nov 1, In : Annals of Physics. 324, 11, p. 2359-2371 13 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2008

Condition for emergence of complex eigenvalues in the Bogoliubov-de Gennes equations

Nakamura, Y., Mine, M., Okumura, M. & Yamanaka, Y., 2008 Apr 1, In : Physical Review A - Atomic, Molecular, and Optical Physics. 77, 4, 043601.

Research output: Contribution to journalArticle

14 Citations (Scopus)

Quantum field theoretical analysis on unstable behavior of Bose-Einstein condensates in optical lattices

Kobayashi, K., Mine, M., Okumura, M. & Yamanaka, Y., 2008 May 1, In : Annals of Physics. 323, 5, p. 1247-1270 24 p.

Research output: Contribution to journalArticle

2007

Condition for the existence of complex modes in a trapped Bose-Einstein condensate with a highly quantized vortex

Fukuyama, E., Mine, M., Okumura, M., Sunaga, T. & Yamanaka, Y., 2007 Oct 9, In : Physical Review A - Atomic, Molecular, and Optical Physics. 76, 4, 043608.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Quantum field theoretical description of dynamical instability of trapped Bose-Einstein condensates

Mine, M., Okumura, M., Sunaga, T. & Yamanaka, Y., 2007 Aug 1, In : Journal of Low Temperature Physics. 148, 3-4, p. 331-336 6 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Quantum field theoretical description of unstable behavior of a Bose-Einstein condensate with a highly quantized vortex in a harmonic potential

Okumura, M., Mine, M., Sunaga, T. & Yamanaka, Y., 2007 Feb 1, In : Laser Physics. 17, 2, p. 211-214 4 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

The condition for existence of complex modes in trapped Bose-Einstein condensate with a highly quantized vortex

Sunaga, T., Fukuyama, E., Mine, M., Okumura, M. & Yamanaka, Y., 2007 Aug 1, In : Journal of Low Temperature Physics. 148, 3-4, p. 381-386 6 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2006

Effect of the zero-mode on the response of a trapped bose-condensed gas

Mine, M., Koide, T., Okumura, M. & Yamanaka, Y., 2006 Apr 1, In : Progress of Theoretical Physics. 115, 4, p. 683-700 18 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Effect of zero mode on the response of trapped bose-condensed atoms

Mine, M., Koide, T., Okumura, M. & Yamanaka, Y., 2006 Mar 22, In : Journal of Physics: Conference Series. 31, 1, p. 211-212 2 p.

Research output: Contribution to journalArticle

Goldstone theorem, Hugenholtz-Pines theorem, and Ward-Takahashi relation in finite volume Bose-Einstein condensed gases

Enomoto, H., Okumura, M. & Yamanaka, Y., 2006 Aug 1, In : Annals of Physics. 321, 8, p. 1892-1917 26 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Unitarily inequivalent vacua in Bose-Einstein condensation of trapped gases

Okumura, M. & Yamanaka, Y., 2006 Jun 15, In : Physica A: Statistical Mechanics and its Applications. 365, 2, p. 429-445 17 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2005
8 Citations (Scopus)
5 Citations (Scopus)
2004

Effects of Quantum Coordinates on Condensate Density in a Trapped Bose-Einstein Condensate

Okumura, M. & Yamanaka, Y., 2004 Feb, In : Progress of Theoretical Physics. 111, 2, p. 199-211 13 p.

Research output: Contribution to journalArticle

Open Access
6 Citations (Scopus)

Nambu-Goldstone mode in trapped bose-einstein condensation

Okumura, M. & Yamanaka, Y., 2004 Jan 1, In : Journal of Modern Optics. 51-6, 7, 1 p.

Research output: Contribution to journalArticle

Response of trapped Bose-Einstein condensates under time-dependent perturbation

Koide, T., Mine, M., Okumura, M. & Yamanaka, Y., 2004 Jan 1, In : Journal of Modern Optics. 51-6, 7, p. 1103-1104 2 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2003

Proper treatment of the zero mode in quantum field theory for trapped Bose-Einstein condensation

Okumura, M. & Yamanaka, Y., 2003 Jul, In : Physical Review A - Atomic, Molecular, and Optical Physics. 68, 1, p. 013609/1-013609/12 013609.

Research output: Contribution to journalArticle

16 Citations (Scopus)

Role of nambu-goldstone mode in trapped bose-einstein condensation

Yamanaka, Y., Okumura, M. & Mine, M., 2003, In : journal of the physical society of japan. 72, SUPPL.C, p. 152-155 4 p.

Research output: Contribution to journalArticle

Open Access
1998

Tunneling time based on the quantum diffusion process approach in multi-channel and optical potential cases

Ohba, I., Imafuku, K. & Yamanaka, Y., 1998 Nov, In : Pramana - Journal of Physics. 51, 5, p. 603-614 12 p.

Research output: Contribution to journalArticle

1997

Effects of inelastic scattering on tunneling time based on the generalized diffusion process approach

Imafuku, K., Ohba, I. & Yamanaka, Y., 1997 Jan 1, In : Physical Review A - Atomic, Molecular, and Optical Physics. 56, 2, p. 1142-1153 12 p.

Research output: Contribution to journalArticle

22 Citations (Scopus)
1996

Concept of quasiparticle in thermofield dynamics for nonequilibrium systems

Yamanaka, Y. & Nakamura, K., 1996 Dec, In : Physics Essays. 9, 4, p. 617-623 7 p.

Research output: Contribution to journalArticle

Quantum dephasing by chaos

Nakazato, H., Namiki, M., Pascazio, S. & Yamanaka, Y., 1996 Oct 28, In : Physics Letters, Section A: General, Atomic and Solid State Physics. 222, 3, p. 130-136 7 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Thermal field theory in non-equilibrium states

Henning, P. A., Nakamura, K. & Yamanaka, Y., 1996 Jun 30, In : International Journal of Modern Physics B. 10, 13-14, p. 1599-1614 16 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
1995

Tunneling time based on the quantum diffusion process approach

Imafuku, K., Ohba, I. & Yamanaka, Y., 1995 Aug 28, In : Physics Letters A. 204, 5-6, p. 329-335 7 p.

Research output: Contribution to journalArticle

25 Citations (Scopus)
1993

A Time‐Dependent Nonequilibrium Calculational Scheme towards the Study of Temperature Fluctuations

Evans, T. S., Hardman, I., Umezawa, H. & Yamanaka, Y., 1993, In : Fortschritte der Physik. 41, 2, p. 151-175 25 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Nonequilibrium thermo field dynamics - In time representation

Yamanaka, Y., 1993, In : Vistas in Astronomy. 37, C, p. 93-97 5 p.

Research output: Contribution to journalArticle

1992

Heisenberg and interaction representations in thermo field dynamics

Evans, T. S., Hardman, I., Umezawa, H. & Yamanaka, Y., 1992 Jan 1, In : Journal of Mathematical Physics. 33, 1, p. 370-378 9 p.

Research output: Contribution to journalArticle

22 Citations (Scopus)
1991

Noise and particle condensation

Umezawa, H. & Yamanaka, Y., 1991 Jan 1, In : Physica A: Statistical Mechanics and its Applications. 170, 2, p. 291-305 15 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

On classical properties of thermal squeezed states

Mann, A., Revzen, M., Umezawa, H. & Yamanaka, Y., 1991 Dec 1, In : Journal of Physics A: Mathematical and General. 24, 19, p. 4527-4533 7 p., 016.

Research output: Contribution to journalArticle

4 Citations (Scopus)

Thermal degree of freedom in thermo field dynamics

Umezawa, H. & Yamanaka, Y., 1991 May 6, In : Physics Letters A. 155, 2-3, p. 75-82 8 p.

Research output: Contribution to journalArticle

14 Citations (Scopus)