Measurement-driven dynamics for a coherently-excited atom

Colin, A.J.T., Barnett, S.M. and Jeffers, J. (2012) Measurement-driven dynamics for a coherently-excited atom. Journal of Modern Optics, 59(21), pp. 1803-1815. (doi: 10.1080/09500340.2012.744479)

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The phenomenon of telegraphing in a measurement-driven two-level atom was noted in Cresser et al. [Cresser, J.D.; Barnett, S.M.; Jeffers, J.; Pegg, D.T. Opt. Commun. 2006, 264, 352–361]. Here we introduce two quantitative measures of telegraphing: one based on the accumulated measurement record and one on the evolution of the quantum state. We use these to analyse the dynamics of the atom over a wide range of parameters. We find, in particular, that the measures provide broadly similar statistics when the measurements are frequent, but differ widely when measurements are sparse. This is in line with intuition, and demonstrates the utility of both measures.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Barnett, Professor Stephen
Authors: Colin, A.J.T., Barnett, S.M., and Jeffers, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Journal of Modern Optics
ISSN (Online):1362-3044

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