Entanglement Detection by Violations of Noisy Uncertainty Relations: A Proof of Principle

verfasst von
Yuan Yuan Zhao, Guo Yong Xiang, Xiao Min Hu, Bi Heng Liu, Chuan Feng Li, Guang Can Guo, René Schwonnek, Ramona Wolf
Abstract

It is well known that the violation of a local uncertainty relation can be used as an indicator for the presence of entanglement. Unfortunately, the practical use of these nonlinear witnesses has been limited to few special cases in the past. However, new methods for computing uncertainty bounds have become available. Here we report on an experimental implementation of uncertainty-based entanglement witnesses, benchmarked in a regime dominated by strong local noise. We combine the new computational method with a local noise tomography in order to design noise-adapted entanglement witnesses. This proof-of-principle experiment shows that quantum noise can be successfully handled by a fully quantum model in order to enhance the ability to detect entanglement.

Organisationseinheit(en)
Institut für Theoretische Physik
QuantumFrontiers
Externe Organisation(en)
University of Science and Technology of China
Sun Yat-Sen University
National University of Singapore
Typ
Artikel
Journal
Physical review letters
Band
122
ISSN
0031-9007
Publikationsdatum
07.06.2019
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Physik und Astronomie (insg.)
Elektronische Version(en)
https://doi.org/10.48550/arXiv.1810.05588 (Zugang: Offen)
https://doi.org/10.1103/PhysRevLett.122.220401 (Zugang: Geschlossen)