Certification of Genuine Multipartite Entanglement with General and Robust Device-Independent Witnesses.

Autor:	Zhang C; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Zhang WH; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Sekatski P; Department of Applied Physics, University of Geneva, Rue de l'École-de-Médecine, 1211 Geneva, Switzerland., Bancal JD; Université Paris-Saclay, CEA, CNRS, Institut de physique théorique, 91191 Gif-sur-Yvette, France., Zwerger M; Max Planck Institute for the Science of Light, Erlangen 91058, Germany., Yin P; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Li GC; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Peng XX; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Chen L; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Han YJ; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Xu JS; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Huang YF; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Chen G; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Li CF; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China., Guo GC; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui 230026, China.; CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.; Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2022 Nov 04; Vol. 129 (19), pp. 190503.
DOI:	10.1103/PhysRevLett.129.190503
Abstrakt:	Genuine multipartite entanglement represents the strongest type of entanglement, which is an essential resource for quantum information processing. Standard methods to detect genuine multipartite entanglement, e.g., entanglement witnesses, state tomography, or quantum state verification, require full knowledge of the Hilbert space dimension and precise calibration of measurement devices, which are usually difficult to acquire in an experiment. The most radical way to overcome these problems is to detect entanglement solely based on the Bell-like correlations of measurement outcomes collected in the experiment, namely, device independently. However, it is difficult to certify genuine entanglement of practical multipartite states in this way, and even more difficult to quantify it, due to the difficulty in identifying optimal multipartite Bell inequalities and protocols tolerant to state impurity. In this Letter, we explore a general and robust device-independent method that can be applied to various realistic multipartite quantum states in arbitrary finite dimension, while merely relying on bipartite Bell inequalities. Our method allows us both to certify the presence of genuine multipartite entanglement and to quantify it. Several important classes of entangled states are tested with this method, leading to the detection of genuinely entangled states. We also certify genuine multipartite entanglement in weakly entangled Greenberger-Horne-Zeilinger states, showing that the method applies equally well to less standard states.
Databáze:	MEDLINE
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