Work

Localized Closed Timelike Curves Can Perfectly Distinguish Quantum States

Year: 2009

Type: article

Abstract: We show that qubits traveling along closed timelike curves are a resource that a party can exploit to distinguish perfectly any set of quantum states. As a result, an adversary with access to closed timelike curves can break any prepare-and-measure quantum key distribution protocol. Our result also implies that a party with access to closed timelike curves can violate the Holevo bound.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.102.210402

Authors: Todd A. Brun, Jim Harrington, Mark M. Wilde

Institutions: University of Southern California, Los Alamos National Laboratory, Centre for Quantum Technologies, National University of Singapore

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2088856496

FWCI: 5.396

Cites: 12

Cited by: 62

Related to: 10