Generation of continuous variable Einstein-Podolsky-Rosen entanglement via the 
Kerr nonlinearity in an optical fiber

Silberhorn, Christine; Lam, PK; Weiss, O; Konig, F; Korolkova, N; Leuchs, Gerd

doi:10.1103/PhysRevLett.86.4267

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Generation of continuous variable Einstein-Podolsky-Rosen entanglement via the Kerr nonlinearity in an optical fiber

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Citation

Silberhorn, C., Lam, P., Weiss, O., Konig, F., Korolkova, N., & Leuchs, G. (2001). Generation of continuous variable Einstein-Podolsky-Rosen entanglement via the Kerr nonlinearity in an optical fiber. PHYSICAL REVIEW LETTERS, 86(19), 4267-4270. doi:10.1103/PhysRevLett.86.4267.

Cite as: https://hdl.handle.net/21.11116/0000-0002-97E2-4

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.