Quantum Downconversion and Multipartite Entanglement via a Mesoscopic Superconducting Quantum Interference Device Ring

Stiffell, P B, Everitt, M J, Clark, TD, Harland, C J and Ralph, J F (2005) Quantum Downconversion and Multipartite Entanglement via a Mesoscopic Superconducting Quantum Interference Device Ring. Physical Review B, 72 (1). 014508. ISSN 1098-0121

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Abstract

In this paper we study, by analogy with quantum optics, the superconducting quantum interference device (SQUID) ring mediated quantum mechanical interaction of an input electromagnetic field oscillator mode with two or more output oscillator modes at subintegers of the input frequency. We show that through the nonlinearity of the SQUID ring multiphoton downconversion can take place between the input and output modes with the resultant output photons being created in an entangled state. We also demonstrate that the degree of this entanglement can be adjusted by means of a static magnetic flux which controls the strength of the interaction between these modes via the SQUID ring.

Item Type: Article
Additional Information: Quantum downconversion and multipartite entanglement via a mesoscopic superconducting quantum interference device ring
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Peter Stiffell
Date Deposited: 06 Feb 2012 19:56
Last Modified: 22 May 2012 13:50
URI: http://srodev.sussex.ac.uk/id/eprint/23112
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