Retrodiction with twolevel atoms: atomic previvals
Barnett, S.M. and Pegg, D. and Jeffers, J. (2002) Retrodiction with twolevel atoms: atomic previvals. Journal of Modern Optics, 49 (7). pp. 11751184. ISSN 09500340

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Abstract
In the JaynesCummings model a twolevel atom interacts with a singlemode electromagnetic field. Quantum mechanics predicts collapses and revivals in the probability that a measurement will show the atom to be excited at various times after the initial preparation of the atom and field. In retrodictive quantum mechanics we seek the probability that the atom was prepared in a particular state given the initial state of the field and the outcome of a later measurement on the atom. Although this is not simply the time reverse of the usual predictive problem, we demonstrate in this paper that retrodictive collapses and revivals also exist. We highlight the differences between predictive and retrodictive evolutions and describe an interesting situation where the prepared state is essentially unretrodictable.
Item type:  Article 

ID code:  6154 
Keywords:  optics, physics, atom, atomic, quantum, quantum mechanics, probability, JaynesCummings, electromagnetic, Optics. Light, Atomic and Molecular Physics, and Optics 
Subjects:  Science > Physics > Optics. Light 
Department:  Faculty of Science > Physics 
Depositing user:  Miss Darcy Spiller 
Date Deposited:  16 May 2008 
Last modified:  29 Apr 2016 08:58 
Related URLs:  
URI:  http://strathprints.strath.ac.uk/id/eprint/6154 