Giant Kerr nonlinearity and superluminal and subluminal polaritonic solitons in a Bose-Einstein condensate via superradiant scattering

Chao Hang, Gregory Gabadadze, Guoxiang Huang

    Research output: Contribution to journalArticle

    Abstract

    We propose a setup to generate giant Kerr nonlinearity and polaritonic solitons via matter-wave superradiant scattering. The system we consider is a long cigar-shaped Bose-Einstein condensate (BEC), pumped by a red-detuned laser field with a space-dependent intensity distribution in transverse directions. The pump and the scattered fields propagate along the longitudinal direction. We show that by means of the atom-photon and atom-atom interactions in the system it is possible to produce a giant nonlinear optical effect. We further show that a backward scattering of the laser field from the BEC is favorable for the formation and stable propagation of polaritonic solitons, which are collective nonlinear excitations of the BEC coupled with the scattered laser field. In the case of backward Stokes (anti-Stokes) scattering the system may support robust bright (dark) polaritonic solitons propagating with superluminal (subluminal) velocity.

    Original languageEnglish (US)
    Article number033805
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume92
    Issue number3
    DOIs
    StatePublished - Sep 4 2015

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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