Analytical solutions by squeezing to the anisotropic Rabi model in the nonperturbative deep-strong-coupling regime

Yu-Yu Zhang and Xiang-You Chen
Phys. Rev. A 96, 063821 – Published 15 December 2017

Abstract

An unexplored nonperturbative deep strong coupling (npDSC) achieved in superconducting circuits has been studied in the anisotropic Rabi model by the generalized squeezing rotating-wave approximation. Energy levels are evaluated analytically from the reformulated Hamiltonian and agree well with numerical ones in a wide range of coupling strength. Such improvement ascribes to deformation effects in the displaced-squeezed state presented by the squeezed momentum variance, which are omitted in previous displaced states. The atom population dynamics confirms the validity of our approach for the npDSC strength. Our approach offers the possibility to explore interesting phenomena analytically in the npDSC regime in qubit-oscillator experiments.

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  • Received 14 September 2017

DOI:https://doi.org/10.1103/PhysRevA.96.063821

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Yu-Yu Zhang* and Xiang-You Chen

  • Department of Physics, Chongqing University, Chongqing 401330, People's Republic of China

  • *yuyuzh@cqu.edu.cn

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Issue

Vol. 96, Iss. 6 — December 2017

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