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 October 8, 2025)
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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, , , 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
Pub Type
Journals
Download Paper
Keywords
quantum compting, CNOT, linear optics, superconducting detectors, SSPD
Citation
Issues
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Created April 3, 2008, Updated October 12, 2021