Transport and quantum walk of nonclassical light in coupled waveguides

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Amit Rai, G. S. Agarwal, and J. H. H. Perk
Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA

Received 24 May 2008; published 8 October 2008

Westudy the transport and quantum walk of nonclassical light inan array of coupled waveguides which have properties like verylow decoherence and thus making them ideal for storage ofquantum information. We show how squeezing gets turned over fromone waveguide to another. We further show how input nonclassicallight can generate entanglement among different waveguides. Our results, whichare valid for an arbitrary number of waveguides, involve bothfirst quantization due to array structure and second quantization dueto the quantum nature of fields and can also beused to discuss the Talbot effect in the quantum regime.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.78.042304
DOI:	10.1103/PhysRevA.78.042304
PACS:	03.67.Bg; 42.50.Ex; 42.50.Lc; 42.50.St 03.67.Bg Entanglement production and manipulation (quantum information) 42.50.Ex Optical implementations of quantum information processing and transfer 42.50.Lc Quantum fluctuations, quantum noise, and quantum jumps (quantum optics) 42.50.St Nonclassical interferometry, subwavelength lithography (quantum optics) YEAR: 2008
KEYWORDS:	optical waveguides, quantum entanglement, Talbot effect

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