Generalized Thermo Vacuum State Derived by the Partial Trace Method

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2009 Chinese Physical Society and IOP Publishing Ltd
, , Citation Hu Li-Yun and Fan Hong-Yi 2009 Chinese Phys. Lett. 26 090307 DOI 10.1088/0256-307X/26/9/090307

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hlyun2008@126.com

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1 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022

2 Department of Physics, Shanghai Jiao Tong University, Shanghai 200030

Dates

  1. Received 29 April 2009
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0256-307X/26/9/090307

Abstract

By virtue of the technique of integration within an ordered product of operators, we present a new approach for deriving the generalized thermo vacuum state which is simpler in form than that obtained from the Takahashi—Umezawa method. using this new approach, the thermo field dynamics can be developed. Applications of the new state are discussed.

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