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arXiv · 2207.04080

Equivalence between simulability of high-dimensional measurements and high-dimensional steering

Benjamin D. M. Jones·Roope Uola·Thomas Cope·Marie Ioannou·Sébastien Designolle·Pavel Sekatski·Nicolas Brunner
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Abstract

The effect of quantum steering arises from the judicious combination of an entangled state with a set of incompatible measurements. Recently, it was shown that this form of quantum correlations can be quantified in terms of a dimension, leading to the notion of genuine high-dimensional steering. While this naturally connects to the dimensionality of entanglement (Schmidt number), we show that this effect also directly connects to a notion of dimension for measurement incompatibility. More generally, we present a general connection between the concepts of steering and measurement incompatibility, when quantified in terms of dimension. From this connection, we propose a novel twist on the problem of simulating quantum correlations. Specifically, we show how the correlations of certain high-dimensional entangled states can be exactly recovered using only shared randomness and lower-dimensional entanglement. Finally, we derive criteria for testing the dimension of measurement incompatibility, and discuss the extension of these ideas to quantum channels.

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Benjamin D. M. Jones, Roope Uola, Thomas Cope, Marie Ioannou, Sébastien Designolle, Pavel Sekatski, Nicolas Brunner. 2022-07-08. Equivalence between simulability of high-dimensional measurements and high-dimensional steering. https://doi.org/10.1103/physreva.107.052425

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