Violation of a causal inequality in a spacetime with definite causal order
Quantum Physics
2019-02-11 v2
Abstract
Processes with an indefinite causal structure may violate a causal inequality, which quantifies quantum correlations that arise from a lack of causal order. In this paper, we show that when the inequalities are analysed with a Gaussian-localised field theoretic definition of particles and labs, the causal indeterminacy of the fields themselves allows a causal inequality to be violated within the causal structure of Minkowski spacetime. We quantify the violation of the inequality and determine the optimal ordering of observers.
Keywords
Cite
@article{arxiv.1804.05498,
title = {Violation of a causal inequality in a spacetime with definite causal order},
author = {C. T. Marco Ho and Fabio Costa and Christina Giarmatzi and Timothy C. Ralph},
journal= {arXiv preprint arXiv:1804.05498},
year = {2019}
}