Abstract : We present a detailed analysis of the quantum-nondemolition (QND) properties of a measurement scheme employing coherently driven three-level atoms in the Λ or cascade configuration inside an optical cavity. We propose to use a strong signal field to empty one of the transitions and dress the signal-transition levels. The atoms become transparent for the signal beam, which sees a ''ghost transition.'' When a probe is applied and tuned to the vicinity of one of the light-shifted levels, the probe phase is extremely sensitive to fluctuations of the signal intensity. This enhances the QND coupling and enables the system to operate at lower cooperativities.
https://hal-iogs.archives-ouvertes.fr/hal-00559005
Contributeur : Philippe Grangier
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Soumis le : lundi 23 mai 2016 - 16:30:13
Dernière modification le : jeudi 11 janvier 2018 - 06:26:09
Klaus M. Gheri, Philippe Grangier, Jean-Philippe Poizat, Daniel F. Walls. Quantum-nondemolition measurements using ghost transitions. Physical Review A, American Physical Society, 1992, 46, pp.4276-4285. 〈10.1103/PhysRevA.46.4276〉. 〈hal-00559005〉
