Resonant enhancement of optical Kerr and higher order nonlinearities in multilevel systems under the conditions of electromagnetically-induced transparency might be useful for quantum signal processing. The main problem with these schemes is related to the selective measurement of high-order atomic coherences that requires multiphoton interactions for the production and detection. In this paper we present a method in which a single laser beam is used for the creation of required nonlinear interactions. It is based on the nonlinear magneto-optical rotation with frequency-modulated light. Using this technique, we measure the nonlinear Faraday rotation caused by four-photon atomic coherence in M-type system. The method is also applicable to the selective control of higher order atomic coherences.
CITATION STYLE
Malakyan, Yu. P., Budker, D., Rochester, S. M., Kimball, D. F., Yashchuk, V. V., & Gawlik, W. (2005). Selective Control of High-Order Atomic Coherences. In Decoherence, Entanglement and Information Protection in Complex Quantum Systems (pp. 91–104). Springer-Verlag. https://doi.org/10.1007/1-4020-3283-8_10
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