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arXiv:1803.08889 · International Journal of Modern Physics B

Entanglement of two distant quantum dots with the flip-flop interaction coupled to plasmonic waveguide

Myong-Chol Ko, Nam-Chol Kim, Ju-Song Ryom, Su-Ryon Ri, Jian-Bo Li

Published Aug 20, 2019• 8 citations
arXivHTMLPDF

Abstract

The entanglement of two distant quantum dots coupled to metallic waveguide has been investigated theoretically in the presence of the flip-flop interaction with the analytic solutions of eigenvalue equations of the system. High entanglement of two quantum dots could be achieved by adjusting the direct-coupling strength of two quantum dots, the coupling strength of quantum dots with surface plasmon along metallic waveguide, the group velocity of surface plasmon and detuning. The discussed system with the flip-flop interaction provides us with a rich way to realize the quantum device for quantum information processing, such as quantum communication and quantum computation.

DOI
10.1142/s0217979219502357

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The entanglement of two distant quantum dots coupled to metallic waveguide has been investigated theoretically in the presence of the flip-flop interaction with the analytic solutions of eigenvalue equations of the system. High entanglement of two quantum dots could be achieved by adjusting the direct-coupling strength of two quantum dots, the coupling strength of quantum dots with surface plasmon along metallic waveguide, the group velocity of surface plasmon and detuning. The discussed system with the flip-flop interaction provides us with a rich way to realize the quantum device for quantum information processing, such as quantum communication and quantum computation.
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We investigate theoretically entanglement generation between two distant quantum dot molecules (QDMs) mediated by quantum bus of metal nanoring with surface plasmon polaritons. We show that the two QDMs can be in an entangled state by adjusting the external gate voltage and the coupling strength between the QDMs and the surface plasmon polaritons. The quantum state transfer between the two QDMs is also discussed. Our scheme may find applications in on-chip quantum networks and integrated optoelectronics devices.
We investigate coherent single surface-plasmon transport in a metal nanowire strongly coupled to two colloidal quantum dots. Analytical expressions are obtained for the transmission and reflection coefficients by solving the corresponding eigenvalue equation. Remote entanglement of the wave functions of the two quantum dots can be created if the interdot distance is equal to a multiple half-wavelength of the surface plasmon. Furthermore, by applying classical laser pulses to the quantum dots, the entangled states can be stored in metastable states that are decoupled from the surface plasmons.
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