Quantum delocalization in photon-pair generation

Forbes, Kayn, Ford, Jack, Jones, Garth and Andrews, David (2017) Quantum delocalization in photon-pair generation. Physical Review A, 96 (2). ISSN 1050-2947

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Abstract

The generation of correlated photon pairs is a key to the production of entangled quantum states, which have a variety of applications within the area of quantum information. In spontaneous parametric down-conversion—the primary method of generating correlated photon pairs—the associated photon annihilation and creation events are generally thought of as being colocated: The correlated pair of photons is localized with regards to the pump photon and its positional origin. A detailed quantum electrodynamical analysis highlights a mechanism exhibiting the possibility of a delocalized origin for paired output photons: The spatial extent of the region from which the pair is generated can be much larger than previously thought. The theory of both localized and nonlocalized degenerate down-conversion is presented, followed by a quantitative analysis using discrete-volume computational methods. The results may have significant implications for quantum information and imaging applications, and the design of nonlinear optical metamaterials.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Faculty of Science
Depositing User: Pure Connector
Date Deposited: 25 Aug 2017 05:06
Last Modified: 19 Sep 2019 00:25
URI: https://ueaeprints.uea.ac.uk/id/eprint/64664
DOI: 10.1103/PhysRevA.96.023850

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