Entanglement between two qubits induced by thermal field

International Conference of Young Scientists and Specialists "Optics-2015"

Bashkirov, E.K.^1 ; Mastyugin, M.S.^1

Physics Department, Samara State University, 1 Academician Pavlov Str., 443011, Russia^1

关键词: Atomic coherence;    Atomic entanglement;    Atomic state;    Degree of entanglement;    Dipole dipole interactions;    Quantum electromagnetic fields;    Thermal field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/735/1/012025/pdf
DOI  :  10.1088/1742-6596/735/1/012025

来源: IOP

【 摘 要 】

We have investigated the influence of dipole-dipole interaction and initial atomic coherence on atomic entanglement dynamics of two qubits. We have considered a model, in which only one atom couples to a quantum electromagnetic field in a cavity, since one of them can move around the cavity. We have shown that the entanglement arises for all pure atomic state even when both atoms are initially in the excited states. We have also derived that degree of entanglement is enhanced in the presence of the atomic coherence.