Speaker
Jens Oluf Andersen
Description
In this talk, I will present some recent result for Bose condensation in two and three-flavor QCD using chiral perturbation theory (chipt). In the pion-condensed phase, we calculate the pressure, energy density, isospin density, and the speed of sound to next-to leading order in chipt. The results are compared with recent high-precision lattice data. The phase diagram in the mu_I-mu_S plane is mapped out, including electromagnetic interactions.
An effective theory for the Goldstone boson is constructed using Son's recipe, valid for momenta p much smaller than mu_I.
Finally, it is shown that the system behaves as a dilute Bose gas close to the phase transition: classic results such as the energy density and the damping rate are derived.
Authors
Hua Zhou
(Chongqing University)
Martin Johnsrud
(NTNU)
Qing Yu
(Southwest University)
Jens Oluf Andersen
