Complex decoherence-free interactions between giant atoms

Lei Du, Lingzhen Guo, and Yong Li
Phys. Rev. A 107, 023705 – Published 3 February 2023

Abstract

Giant atoms provide a promising platform for engineering decoherence-free interactions, which is a major task in modern quantum technologies. Here we study systematically how to implement complex decoherence-free interactions among giant atoms resorting to periodic coupling modulations and suitable arrangements of coupling points. We demonstrate that the phase of the modulation, which is tunable in experiments, can be encoded into the decoherence-free interactions and thus enables phase-dependent dynamics when the giant atoms constitute an effective closed loop. Moreover, we consider the influence of non-Markovian retardation effect arising from large separations of the coupling points and study its dependence on the modulation parameters.

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  • Received 4 November 2022
  • Accepted 17 January 2023

DOI:https://doi.org/10.1103/PhysRevA.107.023705

©2023 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Lei Du1,2, Lingzhen Guo3,4, and Yong Li1,5

  • 1Center for Theoretical Physics and School of Science, Hainan University, Haikou 570228, China
  • 2Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China
  • 3Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, China
  • 4Max Planck Institute for the Science of Light, 91058, Erlangen, Germany
  • 5Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China

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Issue

Vol. 107, Iss. 2 — February 2023

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