The development of quantum theory on a torus has a long history, and can be traced back to
the 1920s, with the attempts by Nordström, Kaluza and Klein to define a fourth spatial …

We show the absence of an instability of homogeneous (chiral) condensates against
spatially inhomogeneous perturbations for various (2+ 1)-dimensional four-fermion and …

We study conformal field theories (CFTs) with Yukawa interactions in dimensions between 2
and 4; they provide UV completions of the Nambu–Jona-Lasinio and Gross–Neveu models …

We discuss a phase diagram of two-dimensional U (1)× U (1) superconductor in the field
theoretic formalizm of [Phys. Rev. Lett. 89 (2002) 067001]. In particular we discuss that when …

We derive a dual presentation of a free energy functional for spin-triplet superconductors in
terms of gauge-invariant variables. The resulting equivalent model in ferromagnetic phase …

The phase diagram and critical properties of the N-component London superconductor are
studied both analytically and through large-scale Monte Carlo simulations in d= 2+ 1 …

The low-energy theory of graphene exhibits spontaneous chiral symmetry breaking due to
pairing of quasiparticles and holes, corresponding to a semimetal-insulator transition at …

We studied the μ-μ 45-T phase diagram of the 2+ 1-dimensional Gross-Neveu model, where
μ denotes the ordinary chemical potential, μ 45 the chiral chemical potential and T the …

We study a lattice model comprising four massless reduced staggered fermions in four
dimensions coupled through an SU (4)-invariant four-fermion interaction. We present both …

We perform a detailed numerical investigation of the dynamics of a single component
“explicitly broken symmetry” λ φ 4 field theory in 1+ 1 dimensions, using a Schwinger-Dyson …