Unknown

Dataset Information

0

The relativistic causality versus no-signaling paradigm for multi-party correlations.


ABSTRACT: The ubiquitous no-signaling constraints state that the probability distributions of outputs of any subset of parties in a Bell experiment are independent of remaining parties' inputs. These constraints are considered to form ultimate limits for physical correlations and led to the fields of post-quantum cryptography, randomness generation besides identifying information-theoretic principles underlying quantum theory. Here we show that while these constraints are sufficient, they are not necessary to enforce relativistic causality in multi-party correlations, i.e., the rule that correlations do not allow casual loops. Depending on the space-time coordinates of the measurement events, causality only imposes a subset of no-signaling conditions. We first consider the n-party Bell experiment (n?>?2) and identify all configurations where subsets of the constraints suffice. Secondly, we examine the implications for device-independent cryptography against an eavesdropper constrained only by relativity, detailing among other effects explicit attacks on well-known randomness amplification and key distribution protocols.

SUBMITTER: Horodecki P 

PROVIDER: S-EPMC6461635 | BioStudies | 2019-01-01

REPOSITORIES: biostudies

Similar Datasets

2020-01-01 | S-EPMC7220922 | BioStudies
2016-01-01 | S-EPMC4980107 | BioStudies
1000-01-01 | S-EPMC4223666 | BioStudies
2018-01-01 | S-EPMC5940886 | BioStudies
1000-01-01 | S-EPMC5409499 | BioStudies
2016-01-01 | S-EPMC4772010 | BioStudies
1000-01-01 | S-EPMC5356073 | BioStudies
1000-01-01 | S-EPMC5792631 | BioStudies
2014-01-01 | S-EPMC4223661 | BioStudies
2016-01-01 | S-EPMC5105160 | BioStudies