Generation of Continuous Variable Einstein-Podolsky-Rosen Entanglement via the Kerr Nonlinearity in an Optical Fiber

Ch Silberhorn, PK Lam, O Weiss, Friedrich Ernst Wilhelm Koenig, Natalia Korolkova, G Leuchs

Research output: Contribution to journalArticlepeer-review

362 Citations (Scopus)

Abstract

We report on the generation of a continuous variable Einstein-Podolsky-Rosen (EPR) entanglement using an optical fiber interferometer. The Kerr nonlinearity in the fiber is exploited for the generation of two independent squeezed beams. These interfere at a beam splitter and EPR entanglement is obtained between the output beams. The correlation of the amplitude (phase) quadratures is measured to be 4.0 +/- 0.2 (4.0 +/- 0.4) dB below the quantum noise limit. The sum criterion for these squeezing variances 0.80 +/- 0.03 < 2 verifies the nonseparability of the state. The product of the inferred uncertainties for one beam (0.64 +/- 0.08) is well below the EPR limit of unity.

Original languageEnglish
Pages (from-to)4267-4270
Number of pages4
JournalPhysical Review Letters
Volume86
Issue number19
DOIs
Publication statusPublished - 7 May 2001

Keywords

  • QUANTUM TELEPORTATION
  • SOLITONS
  • CRITERION
  • SYSTEMS
  • PARADOX
  • PAIRS
  • LIGHT

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