Collisional relaxation in shielded dipolar molecular gases

• URL: http://arxiv.org/abs/2510.17020v2
• Date: Mon, 03 Nov 2025 15:56:49 GMT
• Title: Collisional relaxation in shielded dipolar molecular gases
• Authors: Reuben R. W. Wang, John L. Bohn,
• Abstract summary: We discuss the influence of collisions on the dynamics of an ultracold gas whose constituents interact via dipolar forces.<n>We compare side-by-side several different situations, highlighting their similarities and differences.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We discuss the influence of collisions on the dynamics of an ultracold gas whose constituents interact via dipolar forces. This dynamics is governed by the elastic scattering cross section of the molecules, which is to some extent under the experimentalist's control. We compare side-by-side several different situations, highlighting their similarities and differences. These situations are collisions between: 1) point dipoles; 2) electric-field-shielded polar molecules; and 3) microwave-shielded polar molecules, including the effect of microwave ellipticity.

Related papers

• Hyperfine van der Waals repulsion between open-shell polar molecules [0.0]
  We describe a novel type of interaction between open-shell polar molecules at sub-millikelvin temperatures.<n>This hyperfine van der Waals interaction occurs between two molecules in two rotational states that differ by one quantum.
  arXiv  Detail & Related papers  (2025-07-16T11:55:08Z)
• Ultralong-range Cs-RbCs Rydberg molecules: non-adiabaticity of dipole moments [41.94295877935867]
  We consider ultralong-range polyatomic Rydberg molecules formed by combining a Rydberg cesium atom and a ground-state RbCs molecule. We explore the regime where the charge-dipole interaction due to the Rydberg electron with the diatomic polar molecule couples the quantum defect Rydberg states Cs(ns) to the nearest hydrogenic manifold.
  arXiv  Detail & Related papers  (2024-01-17T22:05:01Z)
• Rotational-state dependence of interactions between polar molecules [0.0]
  We show that where molecules are in rotational states that differ by more than one quantum, they exhibit repulsive van der Waals interactions. At temperatures below a millikelvin, this effect can reduce collisional loss by multiple orders of magnitude. These repulsive interactions lead to applications in quantum simulation and impurity physics with ultracold polar molecules.
  arXiv  Detail & Related papers  (2024-01-11T14:59:43Z)
• Quantum Control of Atom-Ion Charge Exchange via Light-induced Conical Intersections [66.33913750180542]
  Conical intersections are crossing points or lines between two or more adiabatic electronic potential energy surfaces. We predict significant or measurable non-adiabatic effects in an ultracold atom-ion charge-exchange reaction. In the laser frequency window, where conical interactions are present, the difference in rate coefficients can be as large as $10-9$ cm$3$/s.
  arXiv  Detail & Related papers  (2023-04-15T14:43:21Z)
• Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule [52.77024349608834]
  We demonstrate Rydberg blockade due to the charge-dipole interaction between a single Rb atom and a single RbCs molecule confined in optical tweezers. Results open up the prospect of a hybrid platform where quantum information is transferred between individually trapped molecules using Rydberg atoms.
  arXiv  Detail & Related papers  (2023-03-10T18:41:20Z)
• Resonant and first-order dipolar interactions between ultracold molecules in static and microwave electric fields [0.0]
  We study collisions between ultracold polar molecules polarized by microwave or static electric fields. We calculate the loss in two-body collisions that is observable experimentally. Results are presented numerically for fermionic $23$Na$40$K and bosonic $23$Na$39$K molecules.
  arXiv  Detail & Related papers  (2021-06-03T05:58:20Z)
• Molecular Interactions Induced by a Static Electric Field in Quantum Mechanics and Quantum Electrodynamics [68.98428372162448]
  We study the interaction between two neutral atoms or molecules subject to a uniform static electric field. Our focus is to understand the interplay between leading contributions to field-induced electrostatics/polarization and dispersion interactions.
  arXiv  Detail & Related papers  (2021-03-30T14:45:30Z)
• Resonant collisional shielding of reactive molecules using electric fields [2.830197032154302]
  We use an external electric field to shift excited collision channels of ultracold molecules into degeneracy with the initial collision channel. Resonant dipolar interactions mix the channels at long range, dramatically altering the intermolecular potential. We realize a long-lived sample of polar molecules in large electric fields.
  arXiv  Detail & Related papers  (2020-09-16T04:24:54Z)
• Effects of Conical Intersections on Hyperfine Quenching of Hydroxyl OH in collision with an ultracold Sr atom [62.60678272919008]
  We report on ultracold collision dynamics of the hydroxyl free-radical OH with Sr atoms leading to quenching of OH hyperfine states. Our quantum-mechanical calculations of this process reveal that quenching is efficient due to anomalous molecular dynamics in the vicinity of the conical intersection.
  arXiv  Detail & Related papers  (2020-06-26T23:27:25Z)
• Dynamical Strengthening of Covalent and Non-Covalent Molecular Interactions by Nuclear Quantum Effects at Finite Temperature [58.999762016297865]
  Nuclear quantum effects (NQE) tend to generate delocalized molecular dynamics. NQE often enhance electronic interactions and, in turn, can result in dynamical molecular stabilization at finite temperature. Our findings yield new insights into the versatile role of nuclear quantum fluctuations in molecules and materials.
  arXiv  Detail & Related papers  (2020-06-18T14:30:29Z)
• Resonant dipolar collisions of ultracold molecules induced by microwave dressing [0.0]
  We demonstrate microwave dressing on ultracold, fermionic $23$Na$40$K ground-state molecules. We observe resonant dipolar collisions with cross sections exceeding three times the $s$-wave unitarity limit.
  arXiv  Detail & Related papers  (2020-03-05T18:57:57Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.