1-3 August 2016
Plymouth University
Europe/London timezone
The 14th International workshop on QCD in extreme conditions, Aug. 1-3 2016

The phase diagram of QCD with isospin chemical potential

3 Aug 2016, 11:50
Portland Square (Plymouth University)

Portland Square

Plymouth University

Drake Circus Plymouth, Devon PL4 8AA, UK
Talk QCD phase diagram Wednesday AM


Dr Bastian Brandt (University of Frankfurt)


We investigate the phase diagram of QCD at finite isospin chemical potential using 2+1 flavours of staggered fermions with physical quark masses at different lattice spacings and volumes. For high chemical potentials and low temperatures the confined phase shows a transition to the pion condensation phase. This phase is characterised by a proliferation of low modes that slow down the simulation considerably and necessitate the use of an infrared regulator. We discuss a novel strategy to determine the pion condensate in the limit of vanishing regulators. To investigate the convergence properties and the range of validity of the Taylor expansion method at a given order, we compare our results to the Taylor expansion for finite isospin chemical potential at 4 derivative order. This can serve as an important crosscheck for the Taylor expansion method at finite baryon chemical potential, where direct simulations are impossible due to the sign problem.

Primary authors

Dr Bastian Brandt (University of Frankfurt) Dr Gergely Endrodi (University of Frankfurt)

Presentation Materials