Measurement-driven dynamics for a coherently-excited atom

Andrew J. T. Colin; Stephen M. Barnett; John Jeffers

doi:10.1080/09500340.2012.744479

Measurement-driven dynamics for a coherently-excited atom

Andrew J. T. Colin, Stephen M. Barnett, John Jeffers

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Abstract

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, 352361]. 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.

Original language	English
Pages (from-to)	1803-1815
Number of pages	13
Journal	Journal of Modern Optics
Volume	59
Issue number	21
Early online date	22 Nov 2012
DOIs	https://doi.org/10.1080/09500340.2012.744479
Publication status	Published - 2012

Keywords

master equations
Lindblad form
Markov processes
telegraphing
Rabi cycle
two-state atoms
imperfect measurements

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10.1080/09500340.2012.744479

AndrewJMOSubmitted manuscript, 751 KB

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Projects

1 Finished

WOLFSON RESEARCH MERIT AWARDS 2007: PROF S BARNETT

Barnett, S.

Royal Society

1/06/07 → 30/11/12

Project: Research

Cite this

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

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