Gernoth, K. A. and Ristig, M. L. (2010). RENORMALIZED BOSONS AND FERMIONS. Int. J. Mod. Phys. B, 24 (25-26). S. 4979 - 4993. SINGAPORE: WORLD SCIENTIFIC PUBL CO PTE LTD. ISSN 0217-9792

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Abstract

Correlated Density Matrix (CDM) theory permits formal analyses of microscopic properties of strongly correlated quantum fluids and liquids at nonzero temperatures. Equilibrium properties, thermodynamic potentials, correlation and structure functions can be studied formally as well as numerically within the CDM algorithm. Here we provide the essential building blocks for studying the radial distribution function and the single-p article momentum distribution of the ingredients of the quantum systems. We focus on the statistical properties of correlated fluids and introduce the concept of renormalized bosons and fermions. These entities carry the main statistical features of the correlated systems such as liquid (4)He through their specific dependence on temperature, particle number density, and wavenumber encapsulated in their effective masses. The formalism is developed for systems of bosons and of fermions. Numerical calculations for fluid (4)He in the normal phase demonstrate the power of the renormalization concept. The formalism is further extended to analyze the Bose-Einstein condensed phases and gives a microscopic understanding of Tisza's two-fluid model for the normal and superfluid density components.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Gernoth, K. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ristig, M. L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-494155
DOI: 10.1142/S0217979210057146
Journal or Publication Title: Int. J. Mod. Phys. B
Volume: 24
Number: 25-26
Page Range: S. 4979 - 4993
Date: 2010
Publisher: WORLD SCIENTIFIC PUBL CO PTE LTD
Place of Publication: SINGAPORE
ISSN: 0217-9792
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
DENSITY-MATRIX THEORY; NONZERO TEMPERATURES; LAMBDA-TRANSITION; QUANTUM FLUIDS; SUPERFLUIDS; LIQUID-HE-4; HELIUM; HE-4Multiple languages
Physics, Applied; Physics, Condensed Matter; Physics, MathematicalMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/49415

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