About the sign ambiguity in the evaluation of grand canonical traces for quasi-particle statistical density operators
Articolo
Data di Pubblicazione:
2010
Citazione:
About the sign ambiguity in the evaluation of grand canonical traces for quasi-particle statistical density operators / G. Puddu. - In: ACTA PHYSICA POLONICA B. - ISSN 0587-4254. - 41:3(2010), pp. 685-694.
Abstract:
A simple and general prescription for evaluating unambiguously the sign of the grand-canonical trace of quasi-particle statistical density operators (the so-called sign ambiguity in taking the square root of determinants) is given. Sign ambiguities of this kind appear in the evaluation of the grand-canonical partition function projected to good quantum numbers (angular momentum, parity and particle number) in the Hartree-Fock-Bogoliubov approximation at finite temperature, since traces
are usually expressed as the square root of determinants.
A comparison is made with the numerical continuity method.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
G. Puddu
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