Abstract
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.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference137 articles.
1. N. Moiseyev, Non-Hermitian Quantum Mechanics, Cambridge University Press (2011) [DOI].
2. Y. Ashida, Z. Gong and M. Ueda, Non-Hermitian Physics, arXiv:2006.01837 [INSPIRE].
3. J. Dalibard, Y. Castin and K. Molmer, Wave-function approach to dissipative processes in quantum optics, Phys. Rev. Lett. 68 (1992) 580 [INSPIRE].
4. H. J. Carmichael, Quantum trajectory theory for cascaded open systems, Phys. Rev. Lett. 70 (1993) 2273.
5. A. J. Daley, Quantum trajectories and open many-body quantum systems, Adv. Phys. 63 (2014) 77 [arXiv:1405.6694] [INSPIRE].
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