Electric field dependence of complex-dominated ultracold molecular collisions

Abstract

Recent experiments on ultracold non-reactive dipolar molecules have observed high two-body losses, even though these molecules can undergo neither inelastic, nor reactive (as they are in their absolute ground state), nor light-assisted collisions (if they are measured in the dark). In the presence of an electric field these losses seem to be near universal (the probability of loss at short-range is near unity) while in the absence of it the losses seem non-universal. To explain these observations we propose a simple model based on the mixing effect of an electric field on the states of the two diatomic molecules at long-range and on the density-of-states of the tetramer complex formed at short-range, believed to be responsible for the losses. We apply our model to collisions of ground-state molecules of endothermic systems, of current experimental interest.

References in corpus (28)

• Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
• Dipolar collisions of polar molecules in the quantum regime
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Random Matrices and Chaos in Nuclear Physics: Nuclear Reactions
• Universal rate constants for reactive collisions of ultracold molecules
• Direct observation of bimolecular reactions of ultracold KRb molecules
• Statistical Aspects of Ultracold Resonant Scattering
• Collisions of ultracold ^{23}Na^{87}Rb molecules with controlled chemical reactivities
• Photo-induced two-body loss of ultracold molecules
• Sticky collisions of ultracold RbCs molecules
• Loss of ultracold RbCs molecules via optical excitation of long-lived two-body collision complexes
• Universal rates for reactive ultracold polar molecules in reduced dimensions
• Strong dependence of ultracold chemical rates on electric dipole moments
• Collisions of ultracold molecules in bright and dark optical dipole traps
• A Simple Quantum Model of Ultracold Polar Molecule Collisions
• Probing photoinduced two-body loss of ultracold non-reactive bosonic ${}^{23}$Na${}^{87}$Rb and ${}^{23}$Na${}^{39}$K molecules
• A quasiclassical method for calculating the density of states of ultracold collision complexes
• Universalities in ultracold reactions of alkali polar molecules
• Adimensional theory of shielding in ultracold collisions of dipolar rotors
• Tuning ultracold collisions of excited rotational dipolar molecules
• Dipolar Collisions of Ultracold Ground-state Bosonic Molecules
• Structure and thermochemistry of K${}_2$Rb, KRb${}_2$ and K${}_2$Rb${}_2$
• Long-range interactions between polar alkali-metal diatoms in external electric fields
• Unified model of ultracold molecular collisions
• Roaming pathways and survival probability in real-time collisional dynamics of cold and controlled bialkali molecules

Cited by in corpus (4)

• Self-bound dipolar droplets and supersolids in molecular Bose-Einstein condensates
• Ultracold Sticky Collisions: Theoretical and Experimental Status
• Collisional losses of ultracold molecules due to intermediate complex formation
• Symmetry breaking in sticky collisions between ultracold molecules