Speaker
Description
We investigate the phase structure of two- and three-color QCD in the strong coupling limit using the tensor renormalization group method. By analytically integrating out the gauge fields, the partition function can be represented as a Grassmann tensor network. Applying the tensor renormalization group method to the network allows us to directly calculate partition functions in the cold and dense regime, even for the three-color case, where the sign problem is present. At zero temperature, we calculate physical quantities such as the quark number density, chiral condensate, and diquark condensate. We also apply the method to the finite-temperature regime in the three-color case and determine the location of the critical endpoint associated with the chiral and nuclear phase transitions.