Chiral condensate and Dirac spectrum of one- and two-flavor QCD at nonzero $θ$-angle

@inproceedings{Kieburg2018ChiralCA,
  title={Chiral condensate and Dirac spectrum of one- and two-flavor QCD at nonzero \$$\theta$\$-angle},
  author={Mario Kieburg and Jacobus J. M. Verbaarschot and Tilo Wettig},
  year={2018}
}
In previous work we showed that the chiral condensate of one-flavor QCD exhibits a Silver Blaze phenomenon when the quark mass crosses m = 0: the chiral condensate remains constant while the quark mass crosses the spectrum of the Dirac operator, which is dense on the imaginary axis. This behavior can be explained in terms of exponentially large cancellations between contributions from the zero modes and from the nonzero modes when the quark mass is negative. In these proceedings we show that a… 

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