Speaker
Robert Pisarski
(Brookhaven National Laboratory)
Description
I discuss three topics in QCD at nonzero temperature and density. First, how confingurations with fractional topological charge $1/N$ in a $SU(N)$ gauge theory may contribute at low temperature. Second, how the Polyakov loop, which appears to be an artifact of Euclidean space-time, can be naturally introduced in the Hamiltonian form, by introducing new states with test charges. Lastly, I discuss the solution for the low energy excitations for a $SU(N_c)$ theory with $N_f$ light fermions in 1+1 dimensions, which is just a modified free boson for fermion number.
Primary author
Robert Pisarski
(Brookhaven National Laboratory)
