https://doi.org/10.1051/epjconf/201817503004
Phases of a strongly coupled four-fermion theory
1
AEC Institute for Theoretical Physics, University of Bern, 3012 Bern, Switzerland
2
Department of Physics, Syracuse University, Syracuse, New York 13244, United States
* Speaker, e-mail: schaich@itp.unibe.ch
Published online: 26 March 2018
We present ongoing investigations of a four-dimensional lattice field theory with four massless reduced staggered fermions coupled through an SU(4)-invariant fourfermion interaction. As in previous studies of four-fermion and Higgs–Yukawa models with different lattice fermion discretizations, we observe a strong-coupling phase in which the system develops a mass gap without breaking any lattice symmetry. This symmetric strong-coupling phase is separated from the symmetric weak-coupling phase by a narrow region of four-fermi coupling in which the system exhibits long-range correlations.
© The Authors, published by EDP Sciences, 2018
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