Entangling quantum-logic gate operated with an ultrabright semiconductor single-photon source

Gazzano, O., Almeida, M. P., Nowak, A. K., Portalupi, S. L., Lemaître, A., Sagnes, I., White, A. G. and Senellart, P. (2013) Entangling quantum-logic gate operated with an ultrabright semiconductor single-photon source. Physical Review Letters, 110 25: 250501.1-250501.5. doi:10.1103/PhysRevLett.110.250501

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Author Gazzano, O.
Almeida, M. P.
Nowak, A. K.
Portalupi, S. L.
Lemaître, A.
Sagnes, I.
White, A. G.
Senellart, P.
Title Entangling quantum-logic gate operated with an ultrabright semiconductor single-photon source
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
1092-0145
Publication date 2013-06-21
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.110.250501
Open Access Status File (Publisher version)
Volume 110
Issue 25
Start page 250501.1
End page 250501.5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2014
Language eng
Formatted abstract
We demonstrate the unambiguous entangling operation of a photonic quantum-logic gate driven by an ultrabright solid-state single-photon source. Indistinguishable single photons emitted by a single semiconductor quantum dot in a micropillar optical cavity are used as target and control qubits. For a source brightness of 0.56 photons per pulse, the measured truth table has an overlap with the ideal case of 68.4±0.5%, increasing to 73.0±1.6% for a source brightness of 0.17 photons per pulse. The gate is entangling: At a source brightness of 0.48, the Bell-state fidelity is above the entangling threshold of 50% and reaches 71.0±3.6% for a source brightness of 0.15.
Keyword Device
Dot
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Centre for Quantum Computer Technology Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 20 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 22 times in Scopus Article | Citations
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Created: Sun, 11 Aug 2013, 00:05:35 EST by System User on behalf of Engineered Quantum Systems