Prog. Theor. Phys. Vol. 96 No. 1 (1996) pp. 125-144

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Thermal Effect in the Lipkin Model. III

— Dynamical Fluctuation of Thermal Equilibrium State —

Atsushi Kuriyama, João da Providência,^* Yasuhiko Tsue^** and Masatoshi Yamamura

Faculty of Engineering, Kansai University, Suita 564
^*Departamento de Fisica, Universidade de Coimbra, P-3000 Coimbra
^**Department of Physics, Kochi University, Kochi 780

(Received April 18, 1996)

Abstract:

The thermal effects in the Lipkin model manifest themselves mainly through the change in the seniority quantum number. Within the linear approximation, we describe the dynamical fluctuation of the thermal equilibrium state which does not disturb the thermal state, i.e., which does not affect the particle distribution. Further, we discuss the damping effect on the dynamical fluctuation induced by the dynamical coupling with the auxiliary field.

URL : http://ptp.ipap.jp/link?PTP/96/125/
DOI : 10.1143/PTP.96.125

References:

M. Yamamura, J. da Providência, A. Kuriyama and C. Fiolhais, Prog. Theor. Phys. 83 (1990), 749[PTP].
A. Kuriyama, J. de Providência and M. Yamamura, Prog. Theor. Phys. 86 (1991), 419[PTP].
A. Kuriyama, J. da Providência and M. Yamamura, Prog. Theor. Phys. 87 (1992), 911[PTP].
A. Kuriyama, J. da Providência, Y. Tsue and M. Yamamura, Prog. Theor. Phys. 94 (1995), 1039[PTP].
A. Kuriyama, J. da Providência, C. Providência, Y. Tsue and M. Yamamura, Prog. Theor. Phys. 95 (1996), 339[PTP].
T. Hatsuda, Nucl. Phys. A492 (1989), 187.
E. Celeghini, M. Rasetti and G. Vitiello, Ann. of Phys. 215 (1992), 156[CrossRef].
Y. Tsue, A. Kuriyama and M. Yamamura, Prog. Theor. Phys. 91 (1994), 49[PTP].
Y. Tsue, A. Kuriyama and M. Yamamura, Prog. Theor. Phys. 91 (1994), 469[PTP].
T. Marumori, T. Maskawa, F. Sakata and A. Kuriyama, Prog. Theor. Phys. 64 (1980), 1294[PTP].
M. Yamamura and A. Kuriyama, Prog. Theor. Phys. Suppl. No. 93 (1987).
N. Nakanishi, Quantum Field Theory (Baihukan, Tokyo).

Citing Article(s) :

Progress of Theoretical Physics Vol. 114 No. 1 (2005) pp. 57-75 :
The Lipkin Model in the su(M+1)-Algebra for Many-Fermion System and Its Counterpart in the Schwinger Boson Representation

Constança Providência, João da Providência, Yasuhiko Tsue and Masatoshi Yamamura
Progress of Theoretical Physics Vol. 116 No. 1 (2006) pp. 87-105 :
The Lipkin Model in Many-Fermion System as an Example of the su(1,1) ⊗ su(1,1)-Algebraic Model

Constança Providência, João da Providência, Yasuhiko Tsue and Masatoshi Yamamura