Controllable dissipation of a qubit coupled to an engineering reservoir

H. Z. Shen, Shuang Xu, Su Yi, and X. X. Yi
Phys. Rev. A 98, 062106 – Published 5 December 2018

Abstract

The dynamics and non-Markovianity of an atomic impurity qubit (AIQ) immersed in a structured environment is explored where the AIQ is driven by a two-dimensional field and the environment is a quasi-two-dimensional dipolar Bose-Einstein condensate (dBEC). We derive a non-Markovian master equation for the AIQ with initial correlation between the qubit and the dBEC, which contains all the influences of the non-Markovian environment on the atomic impurity qubit. Analyzing the spectrum density for the AIQ-dBEC coupled system and solving the dynamics of the qubit, we find that the atomic impurity qubit can be partially stabilized in its excited state by controlling the x-direction field with the y-direction field fixed. Our analysis reveals that it is the formation of the system-environment bound state that results in such a suppressed dissipation. The present paper is helpful for understanding the effect of the structured and modulated environment and enriches the dynamics of an open system.

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  • Received 16 August 2018

DOI:https://doi.org/10.1103/PhysRevA.98.062106

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

H. Z. Shen1,2, Shuang Xu1, Su Yi3,4,*, and X. X. Yi1,2,†

  • 1Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China
  • 2Center for Advanced Optoelectronic Functional Materials Research, Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
  • 3CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190, China
  • 4School of Physics, CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China

  • *syi@itp.ac.cn
  • yixx@nenu.edu.cn

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Vol. 98, Iss. 6 — December 2018

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