Entanglement-free certification of entangling gates

Almeida, M. P., Gu, Mile, Fedrizzi, Alessandro, Broome, Matthew A., Ralph, Timothy C. and White, Andrew G. (2014) Entanglement-free certification of entangling gates. Physical Review A, 89 4: 042323.1-042323.5. doi:10.1103/PhysRevA.89.042323

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Author Almeida, M. P.
Gu, Mile
Fedrizzi, Alessandro
Broome, Matthew A.
Ralph, Timothy C.
White, Andrew G.
Title Entanglement-free certification of entangling gates
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2014-04-23
Year available 2014
Sub-type Article (original research)
DOI 10.1103/PhysRevA.89.042323
Open Access Status File (Publisher version)
Volume 89
Issue 4
Start page 042323.1
End page 042323.5
Total pages 5
Place of publication College Park, MD United States
Publisher American Physical Society
Language eng
Subject 3107 Atomic and Molecular Physics, and Optics
Abstract Not all quantum protocols require entanglement to outperform their classical alternatives. The nonclassical correlations that lead to a quantum advantage are conjectured to be captured by quantum discord. Here we demonstrate that discord has an immediate practical application: it allows a client who lacks the ability to generate entanglement or conduct quantum measurements to certify whether an untrusted party has entangling gates. We implement our protocol in the discrete-variable regime with photonic qubits and show its success in the presence of high levels of noise and imperfect gate operations. Our technique offers a practical method to test claims of quantum processing and to benchmark entangling operations for physical architectures in which only highly mixed states are available.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID CE110001013
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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