出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We have developed a method to derive the (approximate) quark contribution to the fermion free energy of QCD on a lattice, at finite temperature and chemical potential, with Kogut-Susskind fermions in the flavor basis. We show here the expression at zero temperature. This result has been obtained at the lowest order of the nilpotency expansion. At this order the well known “sign problem" does not arise and the quark contribution to the action can be used as a statistical weight in the Monte Carlo simulations.
