Vibrational relaxation and dephasing of Rb2 attached to helium nanodroplets

Abstract

The vibrational wave-packet dynamics of diatomic rubidium molecules (Rb2) in triplet states formed on the surface of superfluid helium nanodroplets is investigated both experimentally and theoretically. Detailed comparison of experimental femtosecond pump-probe spectra with dissipative quantum dynamics simulations reveals that vibrational relaxation is the main source of dephasing. The rate constant for vibrational relaxation in the first excited triplet state is found to be constant ~0.5ns^-1 for the lowest vibrational levels v< 15 and to increase sharply when exciting to higher energies.

References in corpus (8)

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• Universality of Decoherence
• Atomic and Molecular Impurities in ${}^4$He Clusters
• Quantum interference spectroscopy of RbHe exciplexes formed on helium nanodroplets
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• Wave packet dynamics in triplet states of Na2 attached to helium nanodroplets
• Wave packet dynamics of potassium dimers attached to helium nanodroplets
• Alkali Atoms Attached to ${}^3$He Nanodroplets

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