Nuclear Physics & RIKEN Theory Seminar
"Inhomogeneous phases in dense strongly interacting matter - a generic phenomenon?"
Presented by Dirk Hermann Rischke, Goethe-Universität Frankfurt am Main
Friday, January 31, 2014, 2 pm
Small Seminar Room, Bldg. 510
Hosted by: Rob Pisarski
Calculations within QCD-inspired models as well within QCD in the large-N_c limit show that dense quark matter features inhomogeneous phases. The order parameter for chiral symmetry breaking varies periodically, in the form of a chiral density wave ("chiral spiral") or in the functional form of a Jacobi elliptic function. In this talk, I will demonstrate that this phenomenon also occurs in an effective chiral model with purely hadronic degrees of freedom. The parameters of the model are adjusted to give a reasonable fit of hadron vacuum properties. The model is also able to reproduce nuclear matter saturation properties. We find that, above a density of about 2.4 times the nuclear matter ground state density, an inhomogeneous phase sets in, where the chiral order parameter varies in the form of a chiral density wave. Thus, inhomogeneous phases seem to be a generic feature of high-density strongly interacting matter.