Phase of the fermion determinant at nonzero chemical potential.
Phase of the fermion determinant at nonzero chemical potential.
复制标题
非零化学势下费米子行列式的相位。
DOI:
10.1103/physrevlett.98.031601
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发表时间:
2006
影响因子:
8.6
通讯作者:
J. Verbaarschot
中科院分区:
文献类型:
--
作者:
K. Splittorff;J. Verbaarschot
We show that in the microscopic domain of QCD (also known as the domain) at nonzero chemical potential the average phase factor of the fermion determinant is nonzero for micro<m(pi)/2 and is exponentially suppressed for larger values of the chemical potential. This follows from the chiral Lagrangian that describes the low-energy limit of the expectation value of the phase factor. Explicit expressions for the average phase factor are derived using a random matrix formulation of the zero momentum limit of this chiral Lagrangian.