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Quantum Information Processing

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01-06-2020

Controlling quantum coherence of a two-component Bose–Einstein condensate via an impurity atom

Authors: Zhen Li, Le-Man Kuang

Published in: Quantum Information Processing | Issue 6/2020

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Abstract

We propose a scheme to control quantum coherence of a two-component Bose–Einstein condensate (BEC) by a single impurity atom immersed in the BEC. We show that the single impurity atom can act as a single-atom valve (SAV) to control quantum coherence of the two-component BEC. It is demonstrated that the SAV can realize the on-demand control over quantum coherence at an arbitrary time. Specially, it is found that the SAV can also control higher-order quantum coherence of two-component BEC. We investigate the long-time evolution of quantum coherence of the two-component BEC and find that collapse–revival patterns of quantum coherence can be manipulated by the initial-state parameters of the impurity atom and the impurity–BEC interaction strengths.

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Title: Controlling quantum coherence of a two-component Bose–Einstein condensate via an impurity atom
Authors: Zhen Li
Le-Man Kuang
Publication date: 01-06-2020
Publisher: Springer US
Published in: Quantum Information Processing / Issue 6/2020
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-020-02689-3

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