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Elucidating the Vacuum Structure of the Aoki Phase
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Elucidating the Vacuum Structure of the Aoki Phase
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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 $i\bar\psi\gamma_5\psi$ can take non-zero values, and which can not be connected with the Aoki vacua by parity-flavour symmetry transformations.
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Cited by 1 Pith paper
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Phase diagram of the single-flavor Gross--Neveu--Wilson model from the Grassmann corner transfer matrix renormalization group
For one-flavor Gross-Neveu-Wilson fermions, the Aoki phase is bounded by c=1/2 Ising critical lines and terminates at strong coupling, while c=1 lines separate topological and trivial insulators.
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