Quantum-entangled light from localized emitters

Abstract

Localized radiation sources are analyzed with respect to the relation of nonclassicality and quantum entanglement of the emitted light. The source field parts of the radiation emitted in different directions are closely related to each other. As a consequence, nonclassicality of the light fields in one direction directly implies entanglement of the field modes in different directions. This implication can be extended to multipartite-entanglement and multi-time quantum correlations. Given that a nonclassical effect is observed, our approach explicitly yields the multipartite entanglement witnesses. Two examples are considered, the fluorescence radiation of a system of two-level atoms and of excitons in a semiconductor quantum well.

References in corpus (5)

• Testing nonclassicality in multimode fields: a unified derivation of classical inequalities
• Entanglement between the future and past in the quantum vacuum
• Nonclassical correlation properties of radiation fields
• Universal measurement of quantum correlations of radiation
• Multipartite continuous-variable entanglement