Generation of correlated and anticorrelated multiple fields via atomic spin coherence

Abstract

We report the experimental observation of generation of four and six strongly correlated and anticorrelated laser fields via atomic spin coherence in triple- and quadruple-\ensuremath{\Lambda}-type ${}^{85}$Rb atomic systems. The anticorrelated Stokes and anti-Stokes fields, simultaneously produced through scattering of the applied laser fields off the atomic spin coherence established in advance by the coupling and probe fields, are also highly anticorrelated, respectively, with the corresponding scattering fields. This method can, in principle, be used to create correlated and anticorrelated narrowband multiple fields of any desired order with long correlation times. It paves the way to further study of the generation of multifield quantum correlations and anticorrelations of arbitrarily high order.