Spin- and Isospin-Dependent Momentum Distributions in Fermi Liquids at Non-zero Temperatures

Details Spin- and Isospin-Dependent Momentum Distributions in Fermi Liquids at Non-zero Temperatures Spin- and Isospin-Dependent Momentum Distributions in Fermi Liquids at Non-zero Temperatures

2010-07-26

arxiv.org/abs/1007.4390v1

physica b 406 (2011) 1936-1939

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We explore the structure of momentum distributions of Fermi liquids such as completely polarized 3He, unpolarized liquid 3He, and nuclear matter at nonzero temperatures. The study employs correlated density matrix theory and adapts the algorithm to deal with spin- and isospin-dependent correlations. The analysis is based on the factor decomposition of the one-body reduced density matrix. The decomposition permits to distinguish between statistical correlations and dynamic (direct) correlations. Together with the concept of renormalized fermions the formal results open the pathway to investigate the thermal boundaries of normal Fermi phases within correlated density matrix theory. We also discuss possible transitions from normal phases to anomalous fermion phases triggered by statistical correlations or by periodic phase-phase structures.

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