Entanglement Generated in Quantum Dot-Cavity Coupled System Mediated by Plasmonic Waveguide

We theoretically study the entanglement between two quantum dots (QDs) with dipole–dipole interaction (DDI) in the composite quantum system composed of a plasmonic waveguide and two cavities. The analytical expressions of the pairwise concurrence as a measure of entanglement are obtained by determin...

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Bibliographic Details
Published in:Journal of low temperature physics 2023-10, Vol.213 (1-2), p.80-91
Main Authors: Ryom, Ju-Song, Ri, Gang-Yong, Kim, Nam-Chol, Ko, Myong-Chol, Choe, Il-Hyang, Ri, Su-Ryon
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Dipole interactions
Entangled states
Holes
Low temperature physics
Magnetic Materials
Magnetism
Mathematical analysis
Physical properties
Physics
Physics and Astronomy
Plasmonics
Quantum dots
Quantum entanglement
Quantum theory
Waveguides
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Description
Summary:We theoretically study the entanglement between two quantum dots (QDs) with dipole–dipole interaction (DDI) in the composite quantum system composed of a plasmonic waveguide and two cavities. The analytical expressions of the pairwise concurrence as a measure of entanglement are obtained by determining the excitation probability amplitudes with real space formalism. The properties of the entanglement are discussed in detail under the control of physical parameters such as detuning and coupling strengths. We demonstrate the DDI can improve the entanglement in short distance and highly entangled states can be obtained in the cases of symmetric and asymmetric coupling.
ISSN:0022-2291
1573-7357
DOI:10.1007/s10909-023-02982-2