Abstract
We analyze the principle of a very general and conceptually simple method for manipulating optical fields by coupling them into a matter waves Young double slit apparatus. The field, non resonant with the atoms, acts as a “phase-retarding” medium in one of the arms of the interferometer and shifts the atomic fringe pattern. The method constitutes a simple quantum nondemolition measuring scheme of the photon number. Non classical states such as Schrödinger cats and Fock states of the field are generated in the measurement process. The analysis of the atomic interferometer with optical “retarding” fields provides a very simple and striking illustration of basic concepts of the quantum measurement theory and of the principle of complementarity. This scheme, which would be very difficult to implement in the optical domain, is equivalent to a more feasible and recently proposed Ramsey interference method to measure small microwave fields with beams of Rydberg atoms.
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Associé au Centre National de la Recherche Scientifique et à l'Université Pierre et Marie Curie
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Haroche, S., Brune, M. & Raimond, J.M. Manipulation of optical fields by atomic interferometry: Quantum variations on a theme by young. Appl. Phys. B 54, 355–365 (1992). https://doi.org/10.1007/BF00325380
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DOI: https://doi.org/10.1007/BF00325380