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Covey, Jacob P.

doi:10.1007/978-3-319-98107-9_11

Cited by 1 publication

(1 citation statement)

References 51 publications

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“…This geometry allows us to take advantage of the anisotropic character of the dipolar potential and retain only the repulsive side-to-side dipole-dipole interactions within each 2D site, while preventing the attractive head-to-tail interactions that facilitate losses at short range. Our recent advances in the production of degenerate Fermi gases of polar molecules 7 , 8 , combined with precise electric field control using in-vacuum electrodes 32 ( Fig. 1 ), allow us to perform a systematic characterization of the properties of a 2D Fermi gas of polar molecules.…”

Section: Introductionmentioning

confidence: 99%

Dipolar evaporation of reactive molecules to below the Fermi temperature

Valtolina

Matsuda

Tobias

et al. 2020

Nature

110

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Summary Molecules are the building blocks of matter and their control is key to the investigation of new quantum phases, where rich degrees of freedom can be used to encode information and strong interactions can be precisely tuned 1 . Inelastic losses in molecular collisions 2 – 5 , however, have greatly hampered the engineering of low-entropy molecular systems 6 . So far, the only quantum degenerate gas of molecules has been created via association of two highly degenerate atomic gases 7 , 8 . Here, we use an external electric field along with optical lattice confinement to create a two-dimensional (2D) Fermi gas of spin-polarized potassium-rubidium (KRb) polar molecules, where elastic, tunable dipolar interactions dominate over all inelastic processes. Direct thermalization among the molecules in the trap leads to efficient dipolar evaporative cooling, yielding a rapid increase in phase-space density. At the onset of quantum degeneracy, we observe the effects of Fermi statistics on the thermodynamics of the molecular gas. These results demonstrate a general strategy for achieving quantum degeneracy in dipolar molecular gases where strong, long-range, and anisotropic dipolar interactions can drive the emergence of exotic many-body phases, such as interlayer pairing and p-wave superfluidity.

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Section: Introductionmentioning

confidence: 99%