Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture

by G. Durastante, C. Politi, M. Sohmen, P. Ilzhöfer, M. J. Mark, M. A. Norcia, F. Ferlaino

Abstract:

We report on the observation of heteronuclear magnetic Feshbach resonances in several isotope mixtures of the highly magnetic elements erbium and dysprosium. Among many narrow features, we identify two resonances with a width greater than one Gauss. We characterize one of these resonances, in a mixture of 168 Er and 164 Dy, in terms of loss rates and elastic cross section, and observe a temperature dependence of the on-resonance loss rate suggestive of a universal scaling associated with broad resonances. Our observations hold promise for the use of such a resonance for tuning the interspecies scattering properties in a dipolar mixture. We further compare the prevalence of narrow resonances in an 166Er−164Dy mixture to the single-species case, and observe an increased density of resonances in the mixture.

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Reference:

Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture,
G. Durastante, C. Politi, M. Sohmen, P. Ilzhöfer, M. J. Mark, M. A. Norcia, F. Ferlaino,
Phys. Rev. A, 102, 033330, 2020.

Bibtex Entry:

@Article{durastante2020feshbach,

  author    = {G. Durastante and C. Politi and M. Sohmen and P. Ilzhöfer and M. J. Mark and M. A. Norcia and F. Ferlaino},

  title     = {Feshbach Resonances in an Erbium-Dysprosium Dipolar Mixture},

  journal   = {Phys. Rev. A},

  year      = {2020},

  volume    = {102},

  pages     = {033330},

  month     = {Sep},

  abstract = {We report on the observation of heteronuclear magnetic Feshbach resonances in several isotope mixtures of the highly magnetic elements erbium and dysprosium. Among many narrow features, we identify two resonances with a width greater than one Gauss. We characterize one of these resonances, in a mixture of 168 Er and 164 Dy, in terms of loss rates and elastic cross section, and observe a temperature dependence of the on-resonance loss rate suggestive of a universal scaling associated with broad resonances. Our observations hold promise for the use of such a resonance for tuning the interspecies scattering properties in a dipolar mixture. We further compare the prevalence of narrow resonances in an 166Er−164Dy mixture to the single-species case, and observe an increased density of resonances in the mixture.},

  arxiv     = {https://arxiv.org/abs/2006.06456},

  doi       = {10.1103/PhysRevA.102.033330},

  issue     = {3},

  numpages  = {9},

  publisher = {American Physical Society},

  url       = {https://link.aps.org/doi/10.1103/PhysRevA.102.033330},

}