Elucidating the vacuum structure of the Aoki phase

作者：Azcoiti Vicente; Di Carlo Giuseppe; Follana Eduardo; Vaquero Alejandro^*

来源：Nuclear Physics B, 2013, 870(1): 138-158.

DOI：10.1016/j.nuclphysb.2013.01.008

• Lattice QCD
• QFT
• Wilson fermions
• Spontaneous symmetry breaking
• Parity
• Flavor symmetry

In this paper, we discuss the vacuum structure of QCD with two flavors of Wilson fermions, inside the Aoki phase. We provide numerical evidence, coming from HMC simulations in 4(4), 6(4) and 8(4) lattices, supporting a vacuum structure for this model at strong coupling more complex than the one assumed in the standard wisdom, with new vacua where the expectation value of i (psi) over bar gamma(5)psi can take non-zero values, and which can not be connected with the Aoki vacua by parity-flavor symmetry transformations.

• 出版日期2013-5-1