标题： 淬火格点QED中的费米子关联函数和零动量模态 显示英文标题

标题： Fermionic correlators and zero-momentum modes in quenched lattice QED

摘要： 对于洛伦兹规范，研究了各种Gribov规范变换对费米子传播子的影响，这是在淬火紧束缚格点量子电动力学中进行的。在库仑相内，除了双狄拉克片之外，规范场的零动量模还被证明会导致传播子严重偏离微扰理论所预期的行为。提取费米子质量的标准方法失效了。最近提出的零动量洛伦兹规范被证明可以解决这个问题。 显示英文摘要

摘要： For the Lorentz gauge the influence of various Gribov gauge copies on the fermion propagator is investigated in quenched compact lattice QED. Within the Coulomb phase besides double Dirac sheets the zero-momentum modes of the gauge fields are shown to cause the propagator to deviate strongly from the perturbatively expected behaviour. The standard way to extract the fermion mass fails. The recently proposed zero-momentum Lorentz gauge is demonstrated to cure the problem.