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Molecular Entanglement and Electrospinnability of Biopolymers
Published on: September 3, 2014
Entanglement Detection by Violations of Noisy Uncertainty Relations: A Proof of Principle
Yuan-Yuan Zhao1,2,3, Guo-Yong Xiang1,3, Xiao-Min Hu1,3
1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, People's Republic of China.
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.
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