CNOT and Bell-state analysis in the weak-coupling cavity QED regime

Cristian Bonato, Florian Haupt, Sumant S. R. Oemrawsingh, Jan Gudat, Dapeng Ding, Martin P. van Exter, and Dirk Bouwmeester

Phys. Rev. Lett. 104, 160503 – Published 23 April 2010

Abstract

We propose an interface between the spin of a photon and the spin of an electron confined in a quantum dot embedded in a microcavity operating in the weak-coupling regime. This interface, based on spin selective photon reflection from the cavity, can be used to construct a CNOT gate, a multiphoton entangler and a photonic Bell-state analyzer. Finally, we analyze experimental feasibility, concluding that the schemes can be implemented with current technology.

Received 20 November 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.160503

Authors & Affiliations

Cristian Bonato¹, Florian Haupt², Sumant S. R. Oemrawsingh¹, Jan Gudat¹, Dapeng Ding¹, Martin P. van Exter¹, and Dirk Bouwmeester^1,2

¹Huygens Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, the Netherlands
²University of California Santa Barbara, Santa Barbara, California 93106, USA

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Vol. 104, Iss. 16 — 23 April 2010

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