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

Jun Chen; Joseph B. Altepeter; Milja Medic; Kim Fook Lee; Burc Gokden; Robert H. Hadfield; Sae Woo Nam; Prem Kumar

doi:10.1103/PhysRevLett.100.133603

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

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

Research output: Contribution to journal › Article › peer-review

88 Citations (Scopus)

Abstract

We present the first quantum controlled-not (CNOT) gate realized using a fiber-based indistinguishable photon-pair source in the 1.55 mu m 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. © 2008 The American Physical Society

Original language	English
Article number	133603
Pages (from-to)	-
Number of pages	4
Journal	Physical Review Letters
Volume	100
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.100.133603
Publication status	Published - 4 Apr 2008

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10.1103/PhysRevLett.100.133603

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AU - Nam, Sae Woo

AU - Kumar, Prem

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AB - We present the first quantum controlled-not (CNOT) gate realized using a fiber-based indistinguishable photon-pair source in the 1.55 mu m 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. © 2008 The American Physical Society

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

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