Deutschian closed timelike curves can create entanglement

TL;DR

This paper investigates how Deutschian closed timelike curves (D-CTCs) affect entanglement, revealing that D-CTCs can enable Bell state discrimination and create entanglement through local operations, challenging fundamental entanglement principles.

Contribution

It demonstrates that D-CTCs can create entanglement via local operations and classical communication, contradicting traditional definitions.

Findings

D-CTCs enable unambiguous Bell state discrimination with LOCC

Localized D-CTCs can generate entanglement from separable states

This challenges the fundamental understanding of entanglement

Abstract

We study the nature of entanglement in presence of Deutschian closed timelike curves (D-CTCs) and we observe that qubits traveling along a D-CTC allow unambiguous discrimination of Bell states with Local Operations and Classical Communications (LOCC), that is otherwise known to be impossible. A consequence of this leads us to discover that localized D-CTCs can create entanglement, using just local operations and classical communication. This contradicts the fundamental definition of entanglement.