Phase Transitions of Thermal Squeezed states

Jian-Bin WU and Wen-Zhou LI, H. Umezawa

Communications in Theoretical Physics ›› 1992, Vol. 17 ›› Issue (1) : 31-38.

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Communications in Theoretical Physics ›› 1992, Vol. 17 ›› Issue (1) : 31-38.
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Phase Transitions of Thermal Squeezed states

  • Jian-Bin WU and Wen-Zhou LI1,2, H. Umezawa1,2
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Abstract

By using thermo field dynamics, we studied the phase transitions of thermal squeezed states. Two critical points are obtained in certain cases. They correspond to the transitions from thermal squeezed state to pure squeezed state and to thermal state respectively.

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Jian-Bin WU and Wen-Zhou LI, H. Umezawa. Phase Transitions of Thermal Squeezed states[J]. Communications in Theoretical Physics, 1992, 17(1): 31-38

References

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[2] H. Zheng Phys. Lett. AlS1(1988)115; H. Zheng, D. Feinberg and M. Avignon, Phye. Rev. B59(1989)9405.



[3] J.B. WU, A New Approach to the Phonon Mechanism of High T, Superconductivity, ZUPT-89-04 and 4th National Conference Condensed Matter, Nov. 19a9, Nanjing, China.



[4] M.J. Potasek and B. Yurke, Phys. Rev. A38(1988)1335.



[5] A. Kireev, A. Mann, M. Revzen and H. Umezawa, Phys. Lett. A143(1989)215, and the references therein.



[6] H. Umezawa, H. Matsumoto and M. Tachiki, Thermo Field Dynamics and Condensed States, North-Holland, Amsterdam (1982); H. Umezawa, Quantum Field Theory for Many-Body Problem, Lecture Series, October, 1990.

Funding

National Natural Science Foundation of China.

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