The European Physical Journal D

, Volume 65, Issue 1, pp 99–104

Population redistribution in optically trapped polar molecules


    • Physikalisches InstitutRuprecht-Karls-Universität Heidelberg
  • M. Repp
    • Physikalisches InstitutRuprecht-Karls-Universität Heidelberg
  • O. Dulieu
    • Laboratoire Aimé Cotton, CNRSUniversité Paris Sud XI
  • R. Wester
    • Institut f. Ionenphysik und Angewandte PhysikUniversität Innsbruck
  • M. Weidemüller
    • Physikalisches InstitutRuprecht-Karls-Universität Heidelberg
Regular Article Cold and ultracold molecules

DOI: 10.1140/epjd/e2011-20072-9

Cite this article as:
Deiglmayr, J., Repp, M., Dulieu, O. et al. Eur. Phys. J. D (2011) 65: 99. doi:10.1140/epjd/e2011-20072-9


We investigate the rovibrational population redistribution of polar molecules in the electronic ground state induced by spontaneous emission and blackbody radiation. As a model system we use optically trapped LiCs molecules formed by photoassociation in an ultracold two-species gas. The population dynamics of vibrational and rotational states is modeled using an ab initio electric dipole moment function and experimental potential energy curves. Comparison with the evolution of the v″ = 3 electronic ground state yields good qualitative agreement. The analysis provides important input to assess applications of ultracold LiCs molecules in quantum simulation and ultracold chemistry.

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© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011