Retrodiction with two-level atoms: atomic previvals

S.M. Barnett, D. Pegg, J. Jeffers

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the Jaynes-Cummings model a two-level atom interacts with a single-mode 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.
LanguageEnglish
Pages1175-1184
Number of pages9
JournalJournal of Modern Optics
Volume49
Issue number7
DOIs
Publication statusPublished - 15 Jun 2002

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atoms
quantum mechanics
reaction time
electromagnetic fields
preparation

Keywords

  • optics
  • physics
  • atom
  • atomic
  • quantum
  • quantum mechanics
  • probability
  • Jaynes-Cummings
  • electromagnetic

Cite this

Barnett, S.M. ; Pegg, D. ; Jeffers, J. / Retrodiction with two-level atoms: atomic previvals. In: Journal of Modern Optics. 2002 ; Vol. 49, No. 7. pp. 1175-1184.
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Retrodiction with two-level atoms: atomic previvals. / Barnett, S.M.; Pegg, D.; Jeffers, J.

In: Journal of Modern Optics, Vol. 49, No. 7, 15.06.2002, p. 1175-1184.

Research output: Contribution to journalArticle

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