4 papers
Quantum communication and Bell nonlocality require infinite classical communication to simulate
Carlos de Gois, Thyago S. R. Santos, Carlos Vieira
A quantum system of any fixed dimension can be prepared in a continuum of states, yet it cannot be used to transmit an unlimited amount of classical information. Similarly, the cor…
Distributed Quantum Algorithms Cannot Color Cycles with Probability 1
Xavier Coiteux-Roy, Maxime Flin, Carlos de Gois +3
We prove that any distributed quantum algorithm that finds a -coloring with probability in a cycle of anonymous identical computers has to be global, that is, it needs $Ω(n)…
Generalized Mermin Inequalities for Benchmarking Large-Scale GHZ States
Jianbin Cai, Junxiang Huang, Fynn Otto +15
Multipartite Bell tests provide a correlation-only route to benchmarking quantum processors, but their application at large scales is hindered by the rapid decay of many-body corre…
Optimal Overlapping Tomography
Kiara Hansenne, Rui Qu, Lisa T. Weinbrenner +7
Characterising large-scale quantum systems is central to fundamental physics and essential for applications of quantum technologies. While a full characterisation requires exponent…