Stimulated emission of polarization-entangled photons [2]

A. Lamas-Linares, J. C. Howell, D. Bouwmeester

Research output: Contribution to journalArticlepeer-review

229 Scopus citations

Abstract

Entangled photon pairs--discrete light quanta that exhibit non-classical correlations--play a crucial role in quantum information science (for example, in demonstrations of quantum non-locality, quantum teleportation and quantum cryptography). At the macroscopic optical-field level non-classical correlations can also be important, as in the case of squeezed light, entangled light beams and teleportation of continuous quantum variables. Here we use stimulated parametric down-conversion to study entangled states of light that bridge the gap between discrete and macroscopic optical quantum correlations. We demonstrate experimentally the onset of laser-like action for entangled photons, through the creation and amplification of the spin-1/2 and spin-1 singlet states consisting of two and four photons, respectively. This entanglement structure holds great promise in quantum information science where there is a strong demand for entangled states of increasing complexity.

Original languageAmerican English
Pages (from-to)887-890
Number of pages4
JournalNature
Volume412
Issue number6850
DOIs
StatePublished - 30 Aug 2001
Externally publishedYes

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