Quantum number projection at finite temperature via thermofield dynamics

Journal Article · Tue Feb 01 00:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.71.024314· OSTI ID:20695941

Tanabe, K; Nakada, H ^[1]

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1. Department of Physics, Faculty of Science, Saitama University, Sakura, Saitama 338-8570 (Japan)

Applying thermofield dynamics, we reformulate the exact quantum number projection in the finite-temperature Hartree-Fock-Bogoliubov theory. Explicit formulas are derived for the simultaneous projection of particle number and angular momentum, in parallel to the zero-temperature case. We also propose a practical method for the variation-after-projection calculation, by approximating entropy consistently with the Peierls inequality. Using quantum number projection in finite-temperature mean-field theory will be useful for studying the effects of quantum fluctuations associated with the conservation laws on thermal properties of nuclei.

• OSTI ID: 20695941
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 71, Issue 2; Other Information: DOI: 10.1103/PhysRevC.71.024314; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
CONSERVATION LAWS
ENTROPY
FLUCTUATIONS
HARTREE-FOCK METHOD
HARTREE-FOCK-BOGOLYUBOV THEORY
MEAN-FIELD THEORY
NUCLEAR TEMPERATURE
QUANTUM FIELD THEORY
THERMODYNAMICS