Silberhorn, ChristineLam, Ping KoyWeiss, OliverKonig, FKorolkova, FLeuchs, G2009-09-222010-12-202009-09-222010-12-20Physical Review Letters 86.19 (2001): 4267-42700031-90071079-7114http://hdl.handle.net/10440/904http://digitalcollections.anu.edu.au/handle/10440/904We 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.4 pageshttp://www.sherpa.ac.uk/romeo/index.php "Author can archive pre-print (ie pre-refereeing) … post-print (ie final draft post-refereeing) … [and] publisher's version/PDF. Link to publisher version … [and] Copyright notice required. Publisher's version/PDF can be used on … employers web site." - from SHERPA/RoMEO site (as at 25/02/10). ©2001 The American Physical SocietyKeywords: Interferometers; Laser beams; Optical beam splitters; Optical correlation; Optical Kerr effect; Einstein-Podolsky-Rosen (EPR) entanglements; Quantum theory200110.1103/PhysRevLett.86.42672015-12-12