标题： 费米子符号问题和高密度有效理论 显示英文标题

标题： The Fermion Sign Problem and High Density Effective Theory

摘要： 我们研究密集费米物质中低能模式的欧几里得路径积分测度的正性。 我们表明，如果仅考虑低能自由度，则通常与费米子相关的符号问题不存在。 我们描述了一种在格点上模拟密集QCD的方法，并使用严格的不等式证明了颜色-味锁（CFL）相是三味、无质量QCD的真实真空。 显示英文摘要

摘要： We investigate the positivity of the Euclidean path integral measure for low-energy modes in dense fermionic matter. We show that the sign problem usually associated with fermions is absent if one considers only low-energy degrees of freedom. We describe a method for simulating dense QCD on the lattice and give a proof using rigorous inequalities that the color-flavor locked (CFL) phase is the true vacuum of three flavor, massless QCD.