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Parity Symmetry and Parity Breaking in the Quantum Rabi Model with Addition of Ising Interaction
Authors:WANG Qiong  HE Zhi  YAO Chun-Mei
Affiliation:College of Physics and Electronics, Hunan University of Arts and Science, Changde 415000, China
Abstract:
We explore the possibility to generate new parity symmetry in the quantum Rabi model after a bias is introduced. In contrast to a mathematical treatment in a previous publication [J. Phys. A 46(2013) 265302], we consider a physically realistic method by involving an additional spin into the quantum Rabi model to couple with the original spin by an Ising interaction, and then the parity symmetry is broken as well as the scaling behavior of the ground state by introducing a bias. The rule can be found that the parity symmetry is broken by introducing a bias and then restored by adding new degrees of freedom. Experimental feasibility of realizing the models under discussion is investigated.
Keywords:parity symmetry  parity breaking  Rabi model  scaling behavior  
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