Work

Secure Quantum Key Distribution using Continuous Variables of Single Photons

Year: 2008

Type: article

Abstract: We analyze the distribution of secure keys using quantum cryptography based on the continuous variable degree of freedom of entangled photon pairs. We derive the information capacity of a scheme based on the spatial entanglement of photons from a realistic source, and show that the standard measures of security known for quadrature-based continuous variable quantum cryptography (CV-QKD) are inadequate. A specific simple eavesdropping attack is analyzed to illuminate how secret information may be distilled well beyond the bounds of the usual CV-QKD measures.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.100.110504

Authors: Lijian Zhang, Christine Silberhorn, Ian A. Walmsley

Institutions: University of Oxford, Friedrich-Alexander-Universität Erlangen-Nürnberg

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2007503501

FWCI: 9.01

Cites: 34

Cited by: 95

Related to: 10