Genuine Multipartite Entanglement Detection with Imperfect Measurements: Concept and Experiment
Year: 2024
Type: article
Abstract: Standard procedures for entanglement detection assume that experimenters can exactly implement specific quantum measurements. Here, we depart from such idealizations and investigate, in both theory and experiment, the detection of genuine multipartite entanglement when measurements are subject to small imperfections. For arbitrary qubits number n, we construct multipartite entanglement witnesses where the detrimental influence of the imperfection is independent of n. In a tabletop four-partite photonic experiment, we demonstrate first how a small amount of alignment error can undermine the conclusions drawn from standard entanglement witnesses and then perform the correction analysis. Furthermore, since we consider quantum devices that are trusted but not perfectly controlled, we showcase advantages in terms of noise resilience as compared to device-independent models.
Source: Physical Review Letters
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
Funders: Bundesministerium für Arbeit und Wirtschaft, Wenner-Gren Foundation, Österreichische Nationalstiftung für Forschung, Technologie und Entwicklung, European Commission, National Natural Science Foundation of China, Austrian Science Fund, Eusko Jaurlaritza, Knut och Alice Wallenbergs Stiftelse, Ministerio de Ciencia e Innovación, Christian Doppler Forschungsgesellschaft, Bundesministerium für Digitalisierung und Wirtschaftsstandort, Basque Center for Applied Mathematics, QuantERA, Horizon 2020 Framework Programme, Agencia Estatal de Investigación, Fundamental Research Funds for the Central Universities, Wallenberg Center for Quantum Technology, Chalmers University of Technology, Air Force Office of Scientific Research
Awards: G1035185713, G1272605949, G1480809515, G1523888516, Affordable Quantum Communication for Everyone: Revolutionizing the Quantum Ecosystem from Fabrication to Application, G1633674249, G183983926, G1855990336, G2262748287, G2703773325, G3480869486, G3681454997, G4042783231, G4057981298, G425668148, G434337789, Electronic-photonic integrated quantum simulator platform, G4516736450, G5271502856, G542055026, G5421974903, G55232499, G575169067, QuantERA II ERA-NET Cofund in Quantum Technologies, G6044515653, G6125537131, G6175538065, G6294024929, G6552004136, G7436716198, G7748812462, G7951220496, G8939903727
OpenAlex ID: W4403185845