Non-Hermitian BCS-BEC crossover of Dirac fermions
Keyword(s):
Abstract We investigate chiral symmetry breaking in a model of Dirac fermions with a complexified coupling constant whose imaginary part represents dissipation. We introduce a chiral chemical potential and observe that for real coupling a relativistic BCS-BEC crossover is realized. We solve the model in the mean-field approximation and construct the phase diagram as a function of the complex coupling. It is found that the dynamical mass increases under dissipation, although the chiral symmetry gets restored if dissipation exceeds a threshold.
Keyword(s):
2015 ◽
Vol 30
(34)
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pp. 1550199
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2011 ◽
Vol 20
(06)
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pp. 1509-1517
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Keyword(s):
2002 ◽
Vol 19
(5)
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pp. 1107
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