Work

Maximal quantum randomness in Bell tests

Year: 2013

Type: article

Abstract: The nonlocal correlations exhibited when measuring entangled particles can be used to certify the presence of genuine randomness in Bell experiments. While nonlocality is necessary for randomness certification, it is unclear when and why nonlocality certifies maximal randomness. We provide a simple argument to certify the presence of maximal local and global randomness based on symmetries of a Bell inequality and the existence of a unique quantum probability distribution that maximally violates it. We prove the existence of $N$-party Bell tests attaining maximal global randomness by identifying those combinations of two-outcome measurements by each party providing $N$ perfect random bits.

Source: Physical Review A

DOI: 10.1103/physreva.88.052116

Authors: Chirag Dhara, Giuseppe Prettico, Antonio Acín

Institutions: Institute of Photonic Sciences, Institució Catalana de Recerca i Estudis Avançats

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Award: G125160087