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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 14 — Jul. 6, 2009
  • pp: 11505–11514

Macroscopic entanglement and violation of Bell’s inequalities between two spatially separated quantum dots in a planar photonic crystal system

P. Yao and S. Hughes  »View Author Affiliations


Optics Express, Vol. 17, Issue 14, pp. 11505-11514 (2009)
http://dx.doi.org/10.1364/OE.17.011505


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Abstract

We present and apply a medium-dependent quantum optics formalism for describing the exciton dynamics of two spatially-separated quantum dots on-chip, in the regime of coupled-cavity quantum electrodynamics. With each dot placed in a spatially-separated cavity and coupled through a periodic waveguide channel, the quantum dot excitons behave as a composite entangled pair, exhibiting pronounced entanglement over distances of 300µm and more. The computed light spectra above the two cavities show clear signatures of pronounced photon coupling including increased vacuum Rabi splitting and cavity-induced transmission and absorption. The macroscopic entanglement is confirmed by investigating the Bell inequality, which is shown to be violated for hundreds of picoseconds.

© 2009 Optical Society of America

OCIS Codes
(270.5580) Quantum optics : Quantum electrodynamics
(350.4238) Other areas of optics : Nanophotonics and photonic crystals

ToC Category:
Quantum Optics

History
Original Manuscript: April 9, 2009
Revised Manuscript: June 12, 2009
Manuscript Accepted: June 18, 2009
Published: June 24, 2009

Citation
P. Yao and S. Hughes, "Macroscopic entanglement and violation of Bell’s inequalities between two spatially separated quantum dots in a planar photonic crystal system," Opt. Express 17, 11505-11514 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-14-11505


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