Hyperfine and Zeeman interactions in ultracold collisions of molecular hydrogen with atomic lithium
arXiv:2312.13652 · doi:10.1063/5.0193148
Abstract
We present a rigorous quantum scattering study of the effects of hyperfine and Zeeman interactions on cold Li - H collisions in the presence of an external magnetic field using a recent ab initio potential energy surface. We find that the low-field-seeking states of H predominantly undergo elastic collisions: the ratio of elastic-to-inelastic collisions exceeds 100 for collision energies below 1.5 K. Furthermore, we demonstrate that most inelastic collisions conserve the space-fixed projection of the nuclear spin. We show that the anisotropic hyperfine interaction between the nuclear spin of H and the electron spin of Li can have a significant effect on inelastic scattering in the ultracold regime, as it mediates two processes: the electron spin relaxation in lithium, and the nuclear spin - electron spin exchange. Given the predominance of elastic collisions and the propensity of inelastic collisions to retain H in its low-field-seeking states, our results open up the possibility of sympathetic cooling of molecular hydrogen by atomic lithium, paving the way for future exploration of ultracold collisions and high-precision spectroscopy of H molecules.
arXiv commentThe following article has been accepted by The Journal of Chemical Physics. After it is published, it will be found at https://pubs.aip.org/aip/jcp
References in corpus (31)
- Cold and Ultracold Molecules: Science, Technology, and Applications
- Observation of Quantum Effects in sub Kelvin Cold Reactions
- Direct probe of anisotropy in atom-molecule collisions via quantum scattering resonances
- All-Optical Production of a Lithium Quantum Gas Using Narrow-Line Laser Cooling
- Ultracold Rb-OH collisions and prospects for sympathetic cooling
- Magnetic field effects in ultracold molecular collisions
- Rovibrational energy levels of the hydrogen molecule through nonadiabatic perturbation theory
- Nonadiabatic QED correction to the dissociation energy of the hydrogen molecule
- Quantum calculations of H2-H2 collisions: from ultracold to thermal energies
- Unravelling the stereodynamics of cold HD-H2 collisions
- Stereodynamical control of a quantum scattering resonance in cold molecular collisions
- Vibrational energy transfer in ultracold molecule - molecule collisions
- Lamb-dips and Lamb-peaks in the saturation spectrum of HD
- Cold collisions of OH and Rb. I: the free collision
- Ultracold spin-polarized mixtures of 2Sigma molecules with S-state atoms: Collisional stability and implications for sympathetic cooling
- Sub-ppb measurement of a fundamental band rovibrational transition in HD
- Ultra-high finesse cavity-enhanced spectroscopy for accurate tests of quantum electrodynamics for molecules
- Controlling rotational quenching rates in cold molecular collisions
- Hyperfine structure of the first rotational level in H, D and HD molecules and the deuteron quadrupole moment
- Complete quantum coherent control of ultracold molecular collisions
- The role of low energy resonances in the stereodynamics of cold He+D2 collisions
- Efficient method for quantum calculations of molecule - molecule scattering properties in a magnetic field
- Cold and ultracold NH--NH collisions: The field-free case
- Hyperfine components of all rovibrational quadrupole transitions in the H and D molecules
- A fundamental limit to the efficiency of spin-exchange optical pumping of 3He nuclei
- Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen
- Coherent control of reactive scattering at low temperatures: Signatures of quantum interference in the differential cross sections for F + H2 and F + HD
- Cross-calibration of atomic pressure sensors and deviation from quantum diffractive collision universality for light particles
- Dynamics of a buffer-gas-loaded, deep optical trap for molecules
- Nuclear spin relaxation in cold atom-molecule collisions
- Total angular momentum representation for state-to-state quantum scattering of cold molecules in a magnetic field