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Bilocal versus nonbilocal correlations in entanglement-swapping experiments
Entanglement swapping is a process bywhich two initially independent quantum systems can become entangled and generate nonlocal correlations. To characterize such correlations, we compare them to…
A resource theory of quantum memories and their faithful verification with minimal assumptions
A complete set of game-theoretic conditions equivalent to the existence of a transformation from one quantum channel into another one, by means of classically correlated pre/post processing maps only, are provided, mirroring the resource theory of entanglement in quantum states.
Arbitrarily small amount of measurement independence is sufficient to manifest quantum nonlocality.
- Gilles Pütz, D. Rosset, T. Barnea, Yeong-Cherng Liang, N. Gisin
- MathematicsPhysical review letters
- 21 July 2014
It is proved that even in the simplest Bell test-one involving 2 parties each performing 2 binary-outcome measurements-an arbitrarily small amount of measurement independence is sufficient to manifest quantum nonlocality.
Measurement-device-independent entanglement witnesses for all entangled quantum states.
This work introduces the concept of measurement-device-independent entanglement witnesses (MDI-EWs), which allow one to demonstrateEntanglement of all entangled quantum states with untrusted measurement apparatuses, and shows how to systematically obtain such MDI-ews from standard entangler witnesses.
Universal bound on the cardinality of local hidden variables in networks
A finite upper bound on the cardinality of the value sets of the local hidden variables is proved, finding that the sets of local correlations are connected, closed and semialgebraic, and bounded by tight polynomial Bell-like inequalities.
Self-testing quantum states and measurements in the prepare-and-measure scenario
- A. Tavakoli, J. Kaniewski, T. V'ertesi, D. Rosset, N. Brunner
- Computer SciencePhysical Review A
- 25 January 2018
Self-testing methods for quantum prepare-and-measure experiments, thus not necessarily relying on entanglement and/or violation of a Bell inequality are developed, assuming an upper bound on the Hilbert space dimension.
Device-independent point estimation from finite data and its application to device-independent property estimation
It is shown that the natural analogs of the maximum-likelihood estimation technique and the least-square-error estimation technique in the device-independent context result in point estimates of the true distribution that are physical, unique, computationally tractable and consistent.
Classifying 50 years of Bell inequalities
A decomposition for Bell-like inequalities based on a set of reference expressions which is not affected by degeneracies is proposed and algorithms based on finite group theory are provided to compute this decomposition.
Quantum Inflation: A General Approach to Quantum Causal Compatibility
- Elie Wolfe, Alejandro Pozas-Kerstjens, M. Grinberg, D. Rosset, A. Acín, M. Navascués
- PhysicsPhysical Review X
- 23 September 2019
Causality is a seminal concept in science: any research discipline, from sociology and medicine to physics and chemistry, aims at understanding the causes that could explain the correlations observed…
Genuine Network Multipartite Entanglement.
- M. Navascués, Elie Wolfe, D. Rosset, Alejandro Pozas-Kerstjens
- PhysicsPhysical review letters
- 7 February 2020
This work proposes an alternative definition for genuine multipartite entanglement, whereby a quantum state is genuinely network k-entangled if it cannot be produced by applying local trace-preserving maps over several (k-1)-partite states distributed among the parties, even with the aid of global shared randomness.