Toward the Device-Independent Certification of a Quantum Memory.

Autor:	Sekatski P; Department of Applied Physics, University of Geneva, Geneva, Switzerland., Bancal JD; Université Paris-Saclay, CEA, CNRS, Institut de physique théorique, 91191, Gif-sur-Yvette, France., Ioannou M; Department of Applied Physics, University of Geneva, Geneva, Switzerland., Afzelius M; Department of Applied Physics, University of Geneva, Geneva, Switzerland., Brunner N; Department of Applied Physics, University of Geneva, Geneva, Switzerland.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2023 Oct 27; Vol. 131 (17), pp. 170802.
DOI:	10.1103/PhysRevLett.131.170802
Abstrakt:	Quantum memories represent one of the main ingredients of future quantum communication networks. Their certification is therefore a key challenge. Here we develop efficient certification methods for quantum memories. Considering a device-independent approach, where no a priori characterization of sources or measurement devices is required, we develop a robust self-testing method for quantum memories. We then illustrate the practical relevance of our technique in a relaxed scenario by certifying a fidelity of 0.87 in a recent solid-state ensemble quantum memory experiment. More generally, our methods apply for the characterization of any device implementing a qubit identity quantum channel.
Databáze:	MEDLINE
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