Generalized two-mode thermal vacuum state for the Hamiltonian of a parametric amplifier derived by the IWOP method

In this paper, we employ the technique of integration within an ordered product of operators (IWOP) to derive a generalized two-mode thermal vacuum state (GTTVS) for the Hamiltonian of a parametric amplifier. Application of GTTVS in calculating the ensemble average is discussed. The result is in agreement with that obtained by using the generalized Hellmann–Feynmann theorem.

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Year of publication:	2011
Authors:	Xu, Xue-xiang ; Fan, Hong-yi ; Hu, Li-yun ; Yuan, Hong-chun
Published in:	Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 390.2011, 1, p. 18-23
Publisher:	Elsevier
Subject:	Generalized two-mode thermal vacuum state \| Thermo field dynamics \| The IWOP technique

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Type of publication:	Article
Source:	RePEc - Research Papers in Economics

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