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Strongly Interacting Gas of Two-Electron Fermions at an Orbital Feshbach Resonance

G. Pagano, M. Mancini, G. Cappellini, L. Livi, C. Sias, J. Catani, M. Inguscio, and L. Fallani
Phys. Rev. Lett. 115, 265301 – Published 21 December 2015
Physics logo See Viewpoint: Controlling Collisions in a Two-Electron Atomic Gas

Abstract

We report on the experimental observation of a strongly interacting gas of ultracold two-electron fermions with an orbital degree of freedom and magnetically tunable interactions. This realization has been enabled by the demonstration of a novel kind of Feshbach resonance occurring in the scattering of two Yb173 atoms in different nuclear and electronic states. The strongly interacting regime at resonance is evidenced by the observation of anisotropic hydrodynamic expansion of the two-orbital Fermi gas. These results pave the way towards the realization of new quantum states of matter with strongly correlated fermions with an orbital degree of freedom.

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  • Received 14 September 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.265301

© 2015 American Physical Society

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Controlling Collisions in a Two-Electron Atomic Gas

Published 21 December 2015

Two separate groups have managed to control the interactions in a cold atomic gas in which each atom has two valence electrons.

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Authors & Affiliations

G. Pagano1, M. Mancini1, G. Cappellini2, L. Livi2, C. Sias3,2, J. Catani4,2,5, M. Inguscio3,1,2, and L. Fallani1,2,5

  • 1Department of Physics and Astronomy, University of Florence, I-50019 Sesto Fiorentino, Italy
  • 2LENS European Laboratory for Nonlinear Spectroscopy, I-50019 Sesto Fiorentino, Italy
  • 3INRIM Istituto Nazionale di Ricerca Metrologica, I-10135 Torino, Italy
  • 4INO-CNR Istituto Nazionale di Ottica del CNR, Sezione di Sesto Fiorentino, I-50019 Sesto Fiorentino, Italy
  • 5INFN Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy

See Also

Observation of an Orbital Interaction-Induced Feshbach Resonance in Yb173

M. Höfer, L. Riegger, F. Scazza, C. Hofrichter, D. R. Fernandes, M. M. Parish, J. Levinsen, I. Bloch, and S. Fölling
Phys. Rev. Lett. 115, 265302 (2015)

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Vol. 115, Iss. 26 — 31 December 2015

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