Regular Article – Theoretical Physics
Quark and pion condensates at finite isospin density in chiral perturbation theory
Department of Physics, Wellesley College, 106 Central Street, 02481, Wellesley, MA, USA
2 Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, 7491, Trondheim, Norway
Accepted: 19 October 2020
Published online: 6 November 2020
In this paper, we consider two-flavor QCD at zero temperature and finite isospin chemical potential using a model-independent analysis within chiral perturbation theory at next-to-leading order. We calculate the effective potential, the chiral condensate and the pion condensate in the pion-condensed phase at both zero and nonzero pionic source. We compare our finite pionic source results for the chiral condensate and the pion condensate with recent (2+1)-flavor lattice QCD results. Agreement with lattice results generally improves as one goes from leading order to next-to-leading order.
© The Author(s) 2020
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