Skip to main content

Quantum Rabi Model with Two-Photon Relaxation

Author(s): Malekakhlagh, M; Rodriguez, Alejandro W

To refer to this page use:
Abstract: We study a cavity-QED setup consisting of a two-level system coupled to a single cavity mode with two-photon relaxation. The system dynamics is modeled via a Lindblad master equation consisting of the Rabi Hamiltonian and a two-photon dissipator. We show that an even-photon relaxation preserves the Z2 symmetry of the Rabi model, and provide a framework to study the corresponding non-Hermitian dynamics in the number-parity basis. We discuss the role of different terms in the two-photon dissipator and show how one can extend existing results for the closed Rabi spectrum to the open case. Furthermore, we characterize the role of the Z2 symmetry in the excitation-relaxation dynamics of the system as a function of light-matter coupling. Importantly, we observe that initial states with even-odd parity manifest qualitatively distinct transient and steady state behaviors, contrary to the Hermitian dynamics that is only sensitive to whether or not the initial state is parity invariant. Moreover, the parity-sensitive dynamical behavior is not a creature of ultrastrong coupling and is present even at weak coupling values.
Publication Date: 2019
Citation: Malekakhlagh, M, Rodriguez, AW. (2019). Quantum Rabi Model with Two-Photon Relaxation. Physical Review Letters, 122 (10.1103/PhysRevLett.122.043601
DOI: doi:10.1103/PhysRevLett.122.043601
Type of Material: Journal Article
Journal/Proceeding Title: Physical Review Letters
Version: Author's manuscript

Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.