Restoration of chiral symmetry in cold and dense Nambu-Jona-Lasinio model with tensor renormalization group

We analyze the chiral phase transition of the Nambu-Jona-Lasinio model in the cold and dense region on the lattice, developing the Grassmann version of the anisotropic tensor renormalization group algorithm. The model is formulated with the Kogut-Susskind fermion action. We use the chiral condensate as an order parameter to investigate the restoration of the chiral symmetry. The first-order chiral phase transition is clearly observed in the dense region at vanishing temperature with mu /T similar to O(10(3)) on a large volume of V = 1024(4). We also present the results for the equation of state.

Automated summary

The chiral phase transition of the Nambu-Jona-Lasinio model in the cold and dense region was analyzed using the Grassmann version of the anisotropic tensor renormalization group algorithm. A first-order chiral phase transition was clearly observed at vanishing temperature in the dense region, with mu /T similar to O(10(3)) on a large volume of V = 1024(4). Results for the equation of state were also presented.