Work

Computable Measure of Nonclassicality for Light

Year: 2005

Type: article

Abstract: We propose the entanglement potential (EP) as a measure of nonclassicality for quantum states of a single-mode electromagnetic field. It is the amount of two-mode entanglement that can be generated from the field using linear optics, auxiliary classical states, and ideal photodetectors. The EP detects nonclassicality, has a direct physical interpretation, and can be computed efficiently. These three properties together make it stand out from previously proposed nonclassicality measures. We derive closed expressions for the EP of important classes of states and analyze as an example of the degradation of nonclassicality in lossy channels.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.94.173602

Authors: János K. Asbóth, John Calsamiglia, Helmut Ritsch

Institutions: Universität Innsbruck, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2055970137

FWCI: 2.551

Cites: 38

Cited by: 320

Related to: 9