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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 6 — Mar. 15, 2010
  • pp: 6241–6254

Quantum entanglement in coupled lossy waveguides

Amit Rai, Sumanta Das, and G. S. Agarwal  »View Author Affiliations


Optics Express, Vol. 18, Issue 6, pp. 6241-6254 (2010)
http://dx.doi.org/10.1364/OE.18.006241


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Abstract

We investigate the viability of coupled waveguides as basic units of quantum circuits. We study entanglement when the waveguides are fed in by light produced by a down-converter working either in low gain limit or under large gain. We present explicit analytical results for the measure of entanglement in terms of the logarithmic negativity for a variety of input states. We also address the effect of loss on entanglement dynamics of waveguide modes. Our results indicate that the waveguide structures are reasonably robust against the effect of loss and thus quite appropriate for quantum architectures as well as for the study of coherent phenomena like random walks. Our analysis is based on realistic structures used currently.

© 2010 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(250.5300) Optoelectronics : Photonic integrated circuits
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: December 21, 2009
Manuscript Accepted: February 18, 2010
Published: March 12, 2010

Citation
Amit Rai, Sumanta Das, and Girish Agarwal, "Quantum entanglement in coupled lossy waveguides," Opt. Express 18, 6241-6254 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-6-6241


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