Speaker
Description
In QCD at nonzero isospin chemical potential and zero baryon chemical potential, the Dirac determinant is manifestly real and the system does not suffer from the sign problem. Consequently, one can perform lattice simulations and study pion condensation non-perturbatively. For this reason, pion condensation is an ideal test bed for low-energy models and theories. In this talk, I will discuss chiral perturbation theory and the quark-meson model at finite isospin and zero baryon number. I compute the pion condensate, the quark condensate, and the speed of sound. The results are compared with lattice simulation over a large range of values for mu_I as well as weak-coupling calculations at large density. Our results are generally in good agreement.
