6 papers · 1 filter
A lower bound on the classical simulation cost of star-network correlations
Martin J. Renner
It is well established that quantum strategies outperform classical ones in several communication tasks. We study the quantum communication complexity of correlations arising from…
Almost all pure entangled states enable unbounded nonlocality sharing
Anna Steffinlongo, Nicola D'Alessandro, Martin J. Renner
We establish a connection between Hardy's paradox and nonlocality sharing in sequential bipartite scenarios, where each subsystem is measured in turn by a chain of observers. We sh…
All pure entangled states can lead to fully nonlocal correlations
Martin J. Renner, Edwin Peter Lobo, Arturo Konderak +2
It is a well-established fact that some quantum correlations can be nonlocal, meaning that they cannot be described by a local hidden variable model. Certain quantum correlations h…
Operationally classical simulation of quantum states
Gabriele Cobucci, Alexander Bernal, Martin J. Renner +1
A classical state-preparation device cannot generate states in relative superposition. We introduce classical models in which devices that are individually unable to generate state…
Absolute dimensionality of quantum ensembles
Alexander Bernal, Gabriele Cobucci, Martin J. Renner +1
The dimension of a quantum state is traditionally seen as the number of superposed distinguishable states in a given basis. We propose an absolute, i.e.~basis-independent, notion o…
Reassessing the computational advantage of quantum-controlled ordering of gates
Martin J. Renner, Časlav Brukner
Research on indefinite causal structures is a rapidly evolving field that has a potential not only to make a radical revision of the classical understanding of space-time but also…