Atomic Evolution and Entanglement of Two Qubits in Photon Superfluid

By using reservoir theory, we investigate the evolution of an atom placed in photon superfluid and study the entanglement properties of two qubits interacting with photon superfluid. It is found that the atomic decay rate in photon superfluid changes periodically with position of the atom and the de...

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Bibliographic Details
Published inInternational journal of theoretical physics Vol. 57; no. 7; pp. 2103 - 2115
Main Authors Yin, Miao, Zhang, Xiongfeng, Deng, Yunlong, Deng, Huaqiu
Format Journal Article
LanguageEnglish
Published New York Springer US 01.07.2018
Springer Nature B.V
Subjects
Decay rate
Elementary Particles
Evolution
Fluids
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum entanglement
Quantum Field Theory
Quantum mechanics
Quantum Physics
Qubits (quantum computing)
Superfluidity
Theoretical
Atomic evolution
Photon superfluid
Entanglement
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Summary:By using reservoir theory, we investigate the evolution of an atom placed in photon superfluid and study the entanglement properties of two qubits interacting with photon superfluid. It is found that the atomic decay rate in photon superfluid changes periodically with position of the atom and the decay rate can be inhibited compared to that in usual electromagnetic environment without photon superfluid. It is also found that when two atoms are separately immersed in their own local photon-superfluid reservoir, the entanglement sudden death or birth occurs or not only depends on the initial state of the qubits. What is more, we find a possible case that the concurrence between two qubits can remain a constant value by choosing proper values of parameters of the system, which may provide a new way to preserve quantum entanglement.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-018-3734-2