5 papers
The cost of classically simulating quantum communication is as high as it could be
Riccardo Castellano, Pavel Sekatski, Nicolas Brunner
A long-standing open question is to characterize the classical communication cost of simulating the correlations arising from measurements on finite-dimensional quantum systems. We…
Superactivation of genuine multipartite Bell nonlocality from two-party entanglement
Markus Miethlinger, Riccardo Castellano, Pavel Sekatski +1
Characterizing the relation between entanglement and Bell nonlocality is a long-standing open problem, notably challenging in the multipartite case. Here we investigate the effect…
The entropic coherence is a necessary resource for non-energy preserving gates
Riccardo Castellano, Vasco Cavina, Marti Perarnau-Llobet +2
We consider the task of implementing non-energy preserving gates (NEPG) on a finite-dimensional system S via an energy-preserving interaction with an external battery B. We prove t…
On the entropy growth of sums of iid discrete random variables
Riccardo Castellano, Pavel Sekatski
We derive an asymptotic lower bound on the Shannon entropy of sums of arbitrary iid discrete random variables. The derived bound …
Exact requirements for battery-assisted qubit gates
Riccardo Castellano, Vasco Cavina, Martí Perarnau-Llobet +2
We consider the implementation of a unitary gate on a qubit system S via a global energy-preserving operation acting on S and an auxiliary system B that can be seen as a battery. W…