Abstract
We analyze the chiral phase transition of the Nambu-Jona-Lasinio model in the cold and dense region on the lattice, developing the Grassmann version of the anisotropic tensor renormalization group algorithm. The model is formulated with the Kogut-Susskind fermion action. We use the chiral condensate as an order parameter to investigate the restoration of the chiral symmetry. The first-order chiral phase transition is clearly observed in the dense region at vanishing temperature with μ/T ∼ O(103) on a large volume of V = 10244. We also present the results for the equation of state.
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Akiyama, S., Kuramashi, Y., Yamashita, T. et al. Restoration of chiral symmetry in cold and dense Nambu-Jona-Lasinio model with tensor renormalization group. J. High Energ. Phys. 2021, 121 (2021). https://doi.org/10.1007/JHEP01(2021)121
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DOI: https://doi.org/10.1007/JHEP01(2021)121