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Semi-Classical Approach to the Two-Level Pairing Model --Various Aspects of Phase Change--

Y. Tsue·C. Providencia·J. da Providencia·M. Yamamura
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Abstract

Aspects of the phase change of the two-level pairing model are investigated in the semi-classical treatment by using the variational approch with the mixed-mode coherent state. In the classical limit, $hbar \to 0$, the sharp phase transition appears and the two phases exist in the region where the force strength is larger than a certain critical value. However, it is shown that, in the semi-classical treatment, the above-mentioned behavior of the phase change disappears in the analytical and the numerical treatments. As a result, new understanding about aspects of the phase change in this model is given.

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Y. Tsue, C. Providencia, J. da Providencia, M. Yamamura. 2006-10-19. Semi-Classical Approach to the Two-Level Pairing Model --Various Aspects of Phase Change--. https://doi.org/10.1143/ptp.117.431

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