Protected ultrastrong coupling regime of the two-photon quantum Rabi model with trapped ions

Ricardo Puebla, Myung-Joong Hwang, Jorge Casanova, and Martin B. Plenio
Phys. Rev. A 95, 063844 – Published 27 June 2017

Abstract

We propose a robust realization of the two-photon quantum Rabi model in a trapped-ion setting based on a continuous dynamical decoupling scheme. In this manner the magnetic dephasing noise, which is identified as the main obstacle to achieve long-time coherent dynamics in ion-trap simulators, can be safely eliminated. More specifically, we investigate the ultrastrong coupling regime of the two-photon quantum Rabi model whose realization in trapped ions involves second-order sideband processes. Hence, the resulting dynamics becomes unavoidably slow and more exposed to magnetic noise requiring an appropriate scheme for its elimination. Furthermore, we discuss how dynamical decoupling methods take a dual role in our protocol, namely they remove the main source of decoherence from the dynamics while they actively define the parameter regime of the simulated model.

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  • Received 7 April 2017

DOI:https://doi.org/10.1103/PhysRevA.95.063844

©2017 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsAtomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Ricardo Puebla, Myung-Joong Hwang, Jorge Casanova, and Martin B. Plenio

  • Institut für Theoretische Physik and IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany

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Issue

Vol. 95, Iss. 6 — June 2017

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