费米子符号问题与高密度有效理论
The Fermion Sign Problem and High Density Effective Theory
摘要：
研究了稠密费米子物质中低能模的欧几里德路径积分测度的正性。我们表明，通常与费米子的符号问题是不存在的，如果只考虑低能量的自由度。本文描述了一种在格点上模拟稠密QCD的方法，并用严格不等式证明了色味锁定（CFL）相是三味无质量QCD的真真空。
英文摘要：
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.
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