Generation of Continuous Variable Einstein-Podolsky-Rosen Entanglement via the Kerr Nonlinearity in an Optical Fiber
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2001
- DOI:
- 10.1103/PhysRevLett.86.4267
- arXiv:
- arXiv:quant-ph/0103002
- Bibcode:
- 2001PhRvL..86.4267S
- Keywords:
-
- Quantum Physics
- E-Print:
- RevTeX, 4 pages, 3 figures, to be published in Phys. Rev. Lett