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

Published

Author(s)

Jun Chen, Joseph B. Altepeter, Milja Medic, Fook L. Kim, Burc Gokden, Robert Hadfield, Sae Woo Nam, Prem Kumar

Abstract

We present the first quantum controlled-NOT (CNOT) gate realized using a fiber-based indistinguishable photon-pair source in the 1.55 υm 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.
Citation
Physical Review Letters
Volume
100
Issue
13

Keywords

quantum compting, CNOT, linear optics, superconducting detectors, SSPD

Citation

Chen, J. , Altepeter, J. , Medic, M. , Kim, F. , Gokden, B. , Hadfield, R. , Nam, S. and Kumar, P. (2008), Demonstration of a quantum controlled-NOT gate in the telecom band, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=33005 (Accessed April 13, 2024)
Created April 3, 2008, Updated October 12, 2021