Entanglement detection by violations of noisy uncertainty relations: A proof of principle

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 non-linear witnesses has been limited to few special cases in the past. However, new methods for computing uncertainty bounds became 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 entanglement detection efficiencies.

arXiv comment5+1 pages, 5+2 figures

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Cited by in corpus (9)

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• Quantum verification and estimation with few copies
• The Uncertainty Principle of Quantum Processes
• Direct Experimental Test of Forward and Reverse Uncertainty Relations
• Certification of Genuine Multipartite Entanglement with General and Robust Device-independent Witnesses
• Uncertainty regions of observables and state-independent uncertainty relations
• Uncertainty relations from state polynomial optimization
• Uncertainty relation and the constrained quadratic programming
• Probability density functions of quantum mechanical observable uncertainties