Ontology highlight
ABSTRACT:
SUBMITTER: Marletto C
PROVIDER: S-EPMC6331626 | biostudies-literature | 2019 Jan
REPOSITORIES: biostudies-literature
Nature communications 20190114 1
Closed timelike curves are striking predictions of general relativity allowing for time-travel. They are afflicted by notorious causality issues (e.g. grandfather's paradox). Quantum models where a qubit travels back in time solve these problems, at the cost of violating quantum theory's linearity-leading e.g. to universal quantum cloning. Interestingly, linearity is violated even by open timelike curves (OTCs), where the qubit does not interact with its past copy, but is initially entangled wit ...[more]