Quantum chromodynamics (QCD) is expected to have rich phase structure at finite temperature and density. Our inability to solve strongly interacting theories analytically leaves lattice simulation as the principle method to study its phases and various non-perturbative properties from first principle. However, the sign problem has so far impeded the use of standard lattice simulations methods to study finite density QCD. Therefore, the use of effective models have been popular tool but they are also affected by sign problem. In this talk, I will introduce the phase digram of QCD, sign problem and phenomenological models of QCD. I will then show that the sign problem in effective models of QCD can be solved provided CK symmetry of finite density QCD is respected and discuss its consequences.
Graduate Student Seminars
CK Symmetric Saddle Points In Qcd At Finite Temperature And Density
Kamal Pangeni, Department of Physics, Washington University
February 3, 2017 at 4:00 pm