Quantum electrodynamics under a quench
- URL: http://arxiv.org/abs/2312.13531v1
- Date: Thu, 21 Dec 2023 02:21:29 GMT
- Title: Quantum electrodynamics under a quench
- Authors: Ming-Rui Li and Shao-Kai Jian
- Abstract summary: We investigate the nonequilibrium regime of quantum electrodynamics following a global quantum quench.
Specifically, a massive Dirac fermion is quenched to a gapless state with an interaction with gauge bosons.
In stark contrast to equilibrium (3+1)-dimensional QED with gapless Dirac fermions, where the coupling is marginally irrelevant, we identify a nonequilibrium fixed point characterized by nonFermi liquid behavior.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum electrodynamics (QED) is a cornerstone of particle physics and also
finds diverse applications in condensed matter systems. Despite its
significance, the dynamics of quantum electrodynamics under a quantum quench
remains inadequately explored. In this paper, we investigate the nonequilibrium
regime of quantum electrodynamics following a global quantum quench.
Specifically, a massive Dirac fermion is quenched to a gapless state with an
interaction with gauge bosons. In stark contrast to equilibrium
(3+1)-dimensional QED with gapless Dirac fermions, where the coupling is
marginally irrelevant, we identify a nonequilibrium fixed point characterized
by nonFermi liquid behavior. Notably, the anomalous dimension at this fixed
point varies with the initial quench parameter, suggesting an interesting
quantum memory effect in a strongly interacting system. Additionally, we
propose distinctive experimental signatures for nonequilibrium quantum
electrodynamics.
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