Practical measurement-device-independent entanglement quantification
arXiv:1709.03090 · doi:10.1103/PhysRevA.98.052332
Abstract
The robust estimation of entanglement is key to the validation of implementations of quantum systems. On the one hand, the evaluation of standard entanglement measures, either using quantum tomography or using quantitative entanglement witnesses requires perfect implementation of measurements. On the other hand, measurement-device-independent entanglement witnesses (MDIEWs) can certify entanglement of all entangled states using untrusted measurement devices. We show that MDIEWs can be used as well to quantify entanglement according to standard entanglement measures, and present a practical method to derive such witnesses using experimental data only.
Close to published version. 15 pages incl. 5 pages Appendix, 3 figures
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- Bounding the amount of entanglement from witness operators
- The operational significance of the quantum resource theory of Buscemi nonlocality
- Self-testing and certification using trusted quantum inputs
- Measurement-device-independent quantification of irreducible high-dimensional entanglement
- Analytic Semi-device-independent Entanglement Quantification for Bipartite Quantum States
- Unified Approach to Witness Nonentanglement-Breaking Quantum Channels
- Quantifying Coherence with Untrusted Devices
- Measurement-device-independent Schmidt number certification of all entangled states