Demonstration of a quantum controlled-NOT gate in the telecommunications band

Chen, J., Altepeter, J.B., Medic, M., Lee, K.F., Gokden, B., Hadfield, R.H. , Nam, S.W. and Kumar, P. (2008) Demonstration of a quantum controlled-NOT gate in the telecommunications band. Physical Review Letters, 100(13), p. 133603. (doi:10.1103/PhysRevLett.100.133603)

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Abstract

We present the first quantum controlled-not (cnot) gate realized using a fiber-based indistinguishable photon-pair source in the 1.55  μm telecommunications band. Using this free-space cnot gate, all four Bell states are produced and fully characterized by performing quantum-state tomography, demonstrating the gate’s unambiguous entangling capability and high fidelity. Telecom-band operation makes this cnot gate particularly suitable for quantum-information-processing tasks that are at the interface of quantum communication and linear optical quantum computing.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hadfield, Professor Robert
Authors: Chen, J., Altepeter, J.B., Medic, M., Lee, K.F., Gokden, B., Hadfield, R.H., Nam, S.W., and Kumar, P.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
Published Online:07 April 2008

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