Quantum delocalization in photon-pair generation

Forbes, Kayn ORCID: https://orcid.org/0000-0002-8884-3496, 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
UEA Research Groups:	Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Light and Energy Faculty of Science > Research Groups > Centre for Photonics and Quantum Science
Depositing User:	Pure Connector
Date Deposited:	25 Aug 2017 05:06
Last Modified:	09 Feb 2023 13:45
URI:	https://ueaeprints.uea.ac.uk/id/eprint/64664
DOI:	10.1103/PhysRevA.96.023850

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