标题： 狄拉克算子谱：微扰方法 显示英文标题

标题： The Dirac operator spectrum: a perturbative approach

摘要： 通过数值随机微扰理论计算狄拉克算符的谱，我们旨在揭示广泛接受的关于支撑银行-卡谢关系机制的图景。后者将手征凝聚与谱低端特征值的累积联系起来。这反过来可以归因于量子相互作用中典型的特征值排斥机制。初步结果显示，NSPT确实能够使我们检查由量子排斥引起的大量特征值重新分布。 显示英文摘要

摘要： By computing the Dirac operator spectrum by means of Numerical Stochastic Perturbation Theory, we aim at throwing some light on the widely accepted picture for the mechanism which is behind the Bank-Casher relation. The latter relates the chiral condensate to an accumulation of eigenvalues in the low end of the spectrum. This can be in turn ascribed to the usual mechanism of repulsion among eigenvalues which is typical of quantum interactions. First results appear to confirm that NSPT can indeed enable us to inspect a huge reshuffling of eigenvalues due to quantum repulsion.