Phase of the fermion determinant at nonzero chemical potential.

Phase of the fermion determinant at nonzero chemical potential.
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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
J. Verbaarschot
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
K. Splittorff;J. Verbaarschot

文献摘要

被引文献

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我们证明了在非零化学势的QCD微观域中,当micro<m(pi)/2时,费米子行列式的平均相位因子是非零的,当化学势较大时,费米子行列式的平均相位因子是指数抑制的。这是根据描述相位因子期望值的低能量极限的手征拉格朗日量得出的。平均相位因子的显式表达式推导出使用随机矩阵制定的零动量限制的手征拉格朗日。
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.