Correlations of photoemissions in a multiatomic ensemble driven by a cat-state field

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Abstract

A system of two-level noninteracting atoms driven by superposition of two Glauber coherent photonic states (a cat state) is studied. The field state is continuously restored by a source explicitly incorporated into the model. Due to its nature, the cat state changes phase by π upon stimulated excitation of any atom, a peculiar kind of coherent quantum feedback. That results in correlations between photonic and atomic subsystems. In the limit of a strong field, the ansatz for the system's density matrix is proposed and an approximate analytical solution to the master equation is obtained in the case of a large number of atoms and slow spontaneous emission. Based on this solution, the steady-state second-order correlation function of atomic photoemissions is evaluated and investigated. The results demonstrate a remarkable difference from the case of the classical field (i.e., the field in a Glauber coherent state).

Original languageEnglish
Article number063805
Number of pages5
JournalPhysical Review A
Volume96
Issue number6
DOIs
Publication statusPublished - 5 Dec 2017

Keywords

  • RESONANCE FLUORESCENCE
  • 2-LEVEL ATOM
  • FEEDBACK-CONTROL
  • SUPERPOSITIONS
  • GENERATION
  • LOOP

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