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Particle-number conservation in thermodynamic systems within the Richardson model

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, , Citation N Benhamouda et al 2008 J. Phys.: Conf. Ser. 128 012031 DOI 10.1088/1742-6596/128/1/012031

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1 Laboratoire de Physique Théorique, Faculté de physique, USTHB, BP32, El-Alia, 16111 Bab-Ezzouar, Alger, Algeria

2 Centre de Recherche Nucléaire d'Alger, 2 Bd. Frantz Fanon, BP. 399 Alger-Gare, Algiers, Algeria

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1742-6596/128/1/012031

Abstract

To describe thermal pairing systems, an approach that combines the modified BCS method and the Lipkin-Nogami particle-number projection method is proposed. The expressions of the thermal pairing gap and internal energy are derived. The latter are numerically studied as a function of the temperature within the Richardson model.

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10.1088/1742-6596/128/1/012031