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

Y. Tsue | Zendy; Constança Providência | Zendy; João da Providência | Zendy; M. Yamamura | Zendy

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

Author(s) -

Y. Tsue,

Constança Providência,

João da Providência,

M. Yamamura

Publication year - 2007

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.117.431

Subject(s) - pairing , physics , limit (mathematics) , phase (matter) , phase transition , statistical physics , phase change , quantum mechanics , mathematical analysis , thermodynamics , mathematics , superconductivity

Aspects of the phase change of the two-level pairing model are investigatedin the semi-classical treatment by using the variational approch with themixed-mode coherent state. In the classical limit, $hbar \to 0$, the sharpphase transition appears and the two phases exist in the region where the forcestrength is larger than a certain critical value. However, it is shown that, inthe semi-classical treatment, the above-mentioned behavior of the phase changedisappears in the analytical and the numerical treatments. As a result, newunderstanding about aspects of the phase change in this model is given.Comment: 21 pages, 8 figures but figs.6, 7 and 8 are not included, using PTPTeX.cl

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