12-01E
12-01E
UDC:
537.9
PACS:
37.10.Jk, 67.85.Pq, 71.10.Fd Bose-Fermi-Hubbard model beyond mean field approximation
We develop the approach which allows us to investigate the phase transitions
in the Bose-Fermi-Hubbard model beyond the mean-field approximation. We consider the
case of hard-core bosons and weak boson-fermion interaction. We calculate the
thermodynamical potential of the system taking into account loop-like corrections (in the
random phase approximation) to the mean-field expression for this potential.
Submitted:
29.01
Year:
2012
Pages:
8
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