0402123.pdf (157.28 kB)
Download fileCondensed phase of converting boson-fermion mixtures
preprint
posted on 2006-04-03, 16:50 authored by A.S. AlexandrovTheory of a condensed state of hybridised bosons and fermions is developed. Normal and anomalous Green's functions are obtained diagrammatically and analytically using the Hamiltonian of the boson-fermion model (BFM). A pairing of bosons analogous to the Cooper pairing of fermions is found. There are three coupled condensates in the model, described by the off-diagonal single-particle boson, pair-fermion and pair-boson fields. The Gor'kov expansion in the strength of the order parameter near the transition yields no linear homogeneous term in the Ginzburg-Landau equation, and the infinite Levanyuk-Ginzburg parameter, Gi, which indicates that previous mean-field discussions of BFM are flawed.
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School
- Science
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- Physics
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161059 bytesPublication date
2004Notes
This is a pre-print. It is also available at: http://arxiv.org/abs/cond-mat/0402123.Language
- en