Collisions of ultracold ^{23}Na^{87}Rb molecules with controlled chemical reactivities

Abstract

The collision of molecules at ultracold temperatures is of great importance for understanding the chemical interactions at the quantum regime. While much theoretical work has been devoted to this, experimental data are only available sparsely mainly due to the difficulty in producing ground-state molecules at ultracold temperatures. We report here the creation of optically trapped samples of ground-state bosonic sodium-rubidium molecules with precisely controlled internal states and, enabled by this, a detailed study on the inelastic loss with and without the NaRb + NaRb $\to$ Na${}_2$ + Rb${}_2$ chemical reaction. Contrary to intuitive expectations, we observed very similar loss and heating, regardless of the chemical reactivities. In addition, as evidenced by the reducing loss rate constants with increasing temperatures, we found that these collisions are already outside the Wigner region even though the sample temperatures are sub-microkelvin. Our measurement agrees semi-quantitatively with models based on long-range interactions, but calls for a deeper understanding on the short-range physics for a more complete interpretation.

References in corpus (21)

• The physics of dipolar bosonic quantum gases
• Quantum computation with trapped polar molecules
• Quantum-State Controlled Chemical Reactions of Ultracold KRb Molecules
• Condensed Matter Theory of Dipolar Quantum Gases
• 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
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Reactions of ultracold alkali metal dimers
• Universal rate constants for reactive collisions of ultracold molecules
• Strong dependence of ultracold chemical rates on electric dipole moments
• Universal model for exoergic bimolecular reactions and inelastic processes
• Formation of Ultracold NaRb Feshbach Molecules
• Quantum theory of reactive collisions for 1/r^n potentials
• Van der Waals coefficients for systems with ultracold polar alkali-metal molecules
• Tuning ultracold collisions of excited rotational dipolar 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
• Statistical product distributions for ultracold reactions in external fields
• Ultracold nonreactive molecules in an optical lattice: connecting chemistry to many-body physics

Cited by in corpus (69)

• Direct observation of bimolecular reactions of ultracold KRb molecules
• Observation of Bose-Einstein Condensation of Dipolar Molecules
• Ultracold molecules for quantum simulation: rotational coherences in CaF and RbCs
• Microwave shielding of ultracold polar molecules
• Photo-induced two-body loss of ultracold molecules
• Sticky collisions of ultracold RbCs molecules
• Observation of Collisions between Two Ultracold Ground-State CaF Molecules
• Controlling the scattering length of ultracold dipolar molecules
• Loss of ultracold RbCs molecules via optical excitation of long-lived two-body collision complexes
• Quantum state manipulation and cooling of ultracold molecules
• Bimolecular chemistry in the ultracold regime
• Rotational Coherence Times of Polar Molecules in Optical Tweezers
• Collisions of ultracold molecules in bright and dark optical dipole traps
• Self-bound dipolar droplets and supersolids in molecular Bose-Einstein condensates
• Control of reactive collisions by quantum interference
• Collisions between cold molecules in a superconducting magnetic trap
• 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
• Extending rotational coherence of interacting polar molecules in a spin-decoupled magic trap
• Ultracold Sticky Collisions: Theoretical and Experimental Status
• Microwave shielding of bosonic NaRb molecules
• Dipolar Collisions of Ultracold Ground-state Bosonic Molecules
• Resonant dipolar collisions of ultracold molecules induced by microwave dressing
• Optical shielding of destructive chemical reactions between ultracold ground-state NaRb molecules
• Microwave shielding of ultracold polar molecules with imperfectly circular polarization
• High-resolution Internal State Control of Ultracold ${}^{23}$Na${}^{87}$Rb Molecules
• Unified model of ultracold molecular collisions
• Diatomic molecules of alkali-metal and alkaline-earth-metal atoms: interaction potentials, dipole moments, and polarizabilities
• Seconds-scale coherence on nuclear spin transitions of ultracold polar molecules in 3D optical lattices
• Microwave shielding with far-from-circular polarization
• Spectroscopy on the $A^1\Pi \leftarrow X^1{\Sigma }^{+}$ Transition of Buffer-Gas Cooled AlCl
• Steering ultracold reactions through long-lived transient intermediates
• Efficient conversion of closed-channel dominated Feshbach molecules of ${}^{23}$Na${}^{40}$K to their absolute ground state
• Resonant and first-order dipolar interactions between ultracold molecules in static and microwave electric fields
• Molecular Collisions: from Near-cold to Ultra-cold
• Collisional losses of ultracold molecules due to intermediate complex formation
• Resonant control of elastic collisions between ${}^{23}$Na${}^{40}$K molecules and ${}^{40}$K atoms
• Probing ultracold chemistry using ion spectrometry
• Double Microwave Shielding
• Observation of resonant dipolar collisions in ultracold ${}^{23}$Na${}^{87}$Rb rotational mixtures
• Magnetic tuning of ultracold barrierless chemical reactions
• Efficient Pathway to NaCs Ground State Molecules
• Low-energy collisions between carbon atoms and oxygen molecules in a magnetic trap
• Rotational-state dependence of interactions between polar molecules
• Observation of Microwave Shielding of Ultracold Molecules
• Electric field dependence of complex-dominated ultracold molecular collisions
• Anisotropic Polarizability of Ultracold Ground-state ${}^{23}$Na${}^{87}$Rb Molecules
• Detection of NaRb Feshbach molecule by photodissociation
• Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation
• Hyperfine structure of the ${\mathbf{A}}^1\mathbf{\Pi }$ state of AlCl and its relevance to laser cooling and trapping
• SU($N$) symmetry with ultracold alkali dimers: weak dependence of scattering properties on hyperfine state
• Characterization of the lowest excited-state ro-vibrational level of ${}^{23}$Na${}^{87}$Rb
• Time delays in ultracold atomic and molecular collisions
• Observation of collectivity enhanced magnetoassociation of ${}^6$Li in the quantum degenerate regime
• Dynamics of translational and rotational thermalization of AlF molecules via collisions with cryogenic helium
• Robust storage qubits in ultracold polar molecules
• Fate of thermalization of ultracold fermions with two-body dissipation
• Product-state distribution after isotopic substitution in ultracold atom-molecule collisions
• Dual-species Optical tweezer for Rb and K atoms
• Lossy Quantum Defect Theory of Ultracold Molecular Collisions
• Molecule-molecule and atom-molecule collisions with ultracold RbCs molecules
• Low Duty Cycle Pulsed UV Technique for Spectroscopy of Aluminum Monochloride
• Aspects of arbitrarily oriented dipoles scattering in plane: short-range interaction influence
• Measurement of the Electric Dipole Moment of AlCl by Stark Level Spectroscopy
• Ultracold polar molecules for quantum science and technology
• Model for two-body collisions between ultracold dipolar molecules around a Förster resonance in an electric field
• Hyperfine van der Waals repulsion between open-shell polar molecules
• Optimizing Pulsed-Laser Ablation Production of AlCl Molecules for Laser Cooling
• Van der Waals coefficients for interactions of dysprosium and erbium atoms with alkali-metal and alkaline-earth-metal atoms