Dipole and quadrupole patterns in cold atoms via light induced interactions

Research output: Chapter in Book/Report/Conference proceedingConference contribution book


Recent years have witnessed considerable interest in simulating the dynamics of complex many-body systems by well-controlled cold atom model systems. Among others, magnetic ordering phenomena draw a lot of attention. We demonstrated an unconventional approach to light mediated atomic interactions using laser light undergoing diffraction [1]. Diffractive propagation of periodically modulated light fields leads to an exchange between phase and amplitude modulated planes (Talbot effect) which can be used to couple atomic degrees of freedom. In a feedback scheme this can lead to the spontaneous formation of coupled lattices in the light field and the atomic degrees of freedom. After adiabatic elimination of the dynamics of the light field, one is left with light mediated atomic interactions. The coupling can occur via optomechanical nonlinearities [1] or via optical pumping [2]. In the latter case, the result is a spontaneous magnetic ordering in the atomic cloud, a spin or a magnetic dipole pattern [2]. We will provide further details on the latter as well as evidence for novel alignment patterns, corresponding to quadrupole states.
Original languageEnglish
Title of host publicationEuropean Quantum Electronics Conference, EQEC 2017
PublisherThe Optical Society
ISBN (Print)9781509067367
Publication statusPublished - 25 Jun 2017
EventEuropean Quantum Electronics Conference, EQEC 2017 - Munich, Germany
Duration: 25 Jun 201729 Jun 2017


ConferenceEuropean Quantum Electronics Conference, EQEC 2017


  • dipole patterns
  • quadrupole patterns
  • cold atoms
  • light induced interactions


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