Phase Diagram for the Lattice Scalar Fermion Model

Stephanov, Misha A.; Tsypin, M.M.

doi:10.1016/0370-2693(90)90995-I

Phase Diagram for the Lattice Scalar Fermion Model

Misha A. Stephanov
(
- Moscow State U.
)
,
M.M. Tsypin
(
- Lebedev Inst.
)

1990

5 pages

Published in:

Phys.Lett.B 236 (1990) 344-348

Published: 1990

DOI:

10.1016/0370-2693(90)90995-I

View in:

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Abstract: (Elsevier)

We use mean field and large- d approximations to investigate the phase diagram of lattice scalar-fermion theory with Yukawa coupling. Four phases are found: the spontaneously broken phase (〈 φ 〉 ≠ 0), the symmetric phase (〈 φ 〉 = 0) with massless fermions, the symmetric phase without them and the antiferromagnetically ordered phase. Approximate formulae for phase transition lines and for 〈 ψ ψ〉 are derived.

lattice field theory
field theory: scalar
critical phenomena
coupling: Yukawa
expansion 1/d
mean field approximation
fermion: condensation
numerical calculations

References(23)

Figures(0)

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