Evaporative cooling of reactive polar molecules confined in a two-dimensional geometry

Abstract

Recent experimental developments in the loading of ultracold KRb molecules into quasi-two-dimensional traps, combined with the ability to tune the ratio between elastic and loss (inelastic/reactive) collisions through application of an external electric field, are opening the door to achieving efficient evaporative cooling of reactive polar molecules. In this paper, we use Monte Carlo simulations and semianalytic models to study theoretically the experimental parameter regimes in which evaporative cooling is feasible under current trapping conditions. We investigate the effect of the anisotropic character of dipole-dipole collisions and reduced dimensionality on evaporative cooling. We also present an analysis of the experimentally relevant anti-evaporation effects that are induced by chemical reactions that take place when more than one axial vibrational state is populated.

10 pages, 7 figures

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Cited by in corpus (15)

• Resonant collisional shielding of reactive molecules using electric fields
• Dipolar evaporation of reactive molecules to below the Fermi temperature
• Strongly interacting ultracold polar molecules
• Controlling a quantum gas of polar molecules in an optical lattice
• Dynamical generation of spin squeezing in ultra-cold dipolar molecules
• Observation of generalized t-J spin dynamics with tunable dipolar interactions
• Reactive collisions in confined geometries
• Spin-polarized fermions with $p$-wave interactions
• Microscopic derivation of multi-channel Hubbard models for ultracold nonreactive molecules in an optical lattice
• Evaporative cooling of cold atoms at surfaces
• Lattice model parameters for ultracold nonreactive molecules: chaotic scattering and its limitations
• Reactive collisions of two ultracold particles in a harmonic trap
• Fate of thermalization of ultracold fermions with two-body dissipation
• Quantum reactive scattering in the long-range ion-dipole potential
• Elastic collision rates of spin-polarized fermions in two dimensions