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 below the quantum noise limit. The sum criterion for these squeezing variances verifies the nonseparability of the state. The product of the inferred uncertainties for one beam is well below the EPR limit of unity.
- Received 3 August 2000
DOI:https://doi.org/10.1103/PhysRevLett.86.4267
©2001 American Physical Society