Initial-phase spectroscopy as a control of entangled systems

Levente Horvath, Zbigniew Ficek

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    1 Citation (Scopus)


    We introduce the concept of initial-phase spectroscopy as a control of the dynamics of entangled states encoded into a two-atom system interacting with a broadband squeezed vacuum field. We illustrate our considerations by examining the transient spectrum of the field emitted by two systems, the small sample (Dicke) and the spatially extended (non-Dicke) models. It is found that the shape of the spectral components depends crucially on the relative phase between the initial entangled state and the squeezed field. We follow the temporal evolution of the spectrum and show that depending on the relative phase a hole burning can occur in one of the two spectral lines. We compare the transient behaviour of the spectrum with the time evolution of the initial entanglement and find that the hole burning can be interpreted as a manifestation of the phenomenon of entanglement sudden death. In addition, we find that in the case of the non-Dicke model, the collective damping rate may act like an artificial tweezer that rotates the phase of the squeezed field.

    Original languageEnglish
    Article number125506
    Pages (from-to)1-11
    Number of pages11
    JournalJournal of Physics B: Atomic, Molecular and Optical Physics
    Issue number12
    Publication statusPublished - 2010


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