Origins and optimization of entanglement in plasmonically coupled quantum dots
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Author/Creator ORCID
Date
2016-08-11
Type of Work
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Citation of Original Publication
Otten, Matthew, Jeffrey Larson, Misun Min, Stefan M. Wild, Matthew Pelton, and Stephen K. Gray. “Origins and Optimization of Entanglement in Plasmonically Coupled Quantum Dots.” Physical Review A 94, no. 2 (August 11, 2016): 022312. https://doi.org/10.1103/PhysRevA.94.022312.
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
Public Domain Mark 1.0
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Abstract
A system of two or more quantum dots interacting with a dissipative plasmonic nanostructure is investigated in detail by using a cavity quantum electrodynamics approach with a model Hamiltonian. We focus on determining and understanding system configurations that generate multiple bipartite quantum entanglements between the occupation states of the quantum dots. These configurations include allowing for the quantum dots to be asymmetrically coupled to the plasmonic system. Analytical solution of a simplified limit for an arbitrary number of quantum dots and numerical simulations and optimization for the two- and three-dot cases are used to develop guidelines for maximizing the bipartite entanglements. For any number of quantum dots, we show that through simple starting states and parameter guidelines, one quantum dot can be made to share a strong amount of bipartite entanglement with all other quantum dots in the system, while entangling all other pairs to a lesser degree.