Описание
Discussion leader: Michael Buballa
Chairperson: Michael Buballa
I will give a brief review on studies of spatially modulated chiral condensates performed within effective low-energy models of QCD, discussing methods and some recent results on the possible phase structure of quark matter at finite baryon density.
We investigate the stability of inhomogeneous chiral-symmetry breaking phases at non-vanishing chemical potential and temperature by applying the Functional Renormalization Group (FRG) to the two-flavor quark-meson model (QMM) in the chiral limit. The stability of inhomogeneous phases under quantum and thermal fluctuations beyond the mean-field approximation is an open question in the...
We present some recent results on inhomogeneous phases and baryons in the 1+1-dimensional Gross-Neveu model at finite temperature and finite chemical potential. It is known, that in the large $N_f$-limit the system shows an inhomogeneous condensate at low temperature and large chemical potential. We address the question whether a breaking of translation invariance is also seen for finite...
We explore the existence of inhomogeneous phases in the 2+1-dimensional Gross-Neveu model in the limit of infinitely many flavors using a continuum approach as well as lattice field theory. At finite value of the regulator (momentum cutoff, lattice spacing) we find inhomogeneous phases. These phases disappear, however, when removing the regulator, i.e. when sending the momentum cutoff to...
The ground state of QCD at nonzero baryon number chemical potential and in sufficiently strong magnetic fields is the Chiral Soliton Lattice: a topological phase carrying a crystalline condensate of neutral pions. The same is true for other QCD-like theories, including theories free from the sign problem. This disproves the long-standing conjecture that positivity of the determinant of the...
