Photoassociation of ultracold long-range polyatomic molecules

• URL: http://arxiv.org/abs/2007.00261v2
• Date: Thu, 10 Jun 2021 14:30:27 GMT
• Title: Photoassociation of ultracold long-range polyatomic molecules
• Authors: Marko Gacesa and Jason N. Byrd and Jonathan Smucker and John A. Montgomery, Jr. and Robin C\^ot\'e
• Abstract summary: We explore the feasibility of optically forming long-range tetratomic and larger polyatomic molecules in their ground electronic state from ultracold pairs of polar molecules aligned by external fields. We find that a tetratomic can be formed either as a weakly bound complex in a very extended halo state or as a pure long-range molecule composed of collinear or nearly-collinear diatomic molecules. The latter is a novel type of tetratomic molecule comprised of two diatomic molecules bound at long intermolecular range and predicted to be stable in cold and ultracold regimes.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We explore the feasibility of optically forming long-range tetratomic and larger polyatomic molecules in their ground electronic state from ultracold pairs of polar molecules aligned by external fields. Depending on the relative orientation of the interacting diatomic molecules, we find that a tetratomic can be formed either as a weakly bound complex in a very extended halo state or as a pure long-range molecule composed of collinear or nearly-collinear diatomic molecules. The latter is a novel type of tetratomic molecule comprised of two diatomic molecules bound at long intermolecular range and predicted to be stable in cold and ultracold regimes. Our numerical studies were conducted for ultracold KRb and RbCs, resulting in production of (KRb)$_2$ and (RbCs)$_2$ complexes, respectively. Based on universal properties of long-range interactions between polar molecules, we identify triatomic and tetratomic linear polar molecules with favorable ratio of dipole and quadrupole moments for which the apporach could be generalized to form polyatomic molecules.

Related papers

• 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)
• Ultracold field-linked tetratomic molecules [2.083036917269332]
  We create ultracold polyatomic molecules by electroassociation in a degenerate Fermi gas of microwave-dressed polar molecules. Our result demonstrates a universal tool for assembling ultracold polyatomic molecules from smaller polar molecules.
  arXiv  Detail & Related papers  (2023-06-01T17:55:17Z)
• Engineering long-range molecular potentials by external drive [0.0]
  We report the engineering of molecular potentials at large interatomic distances. The molecular states are generated by off-resonant optical coupling to a highly excited, long-range Rydberg molecular potential. Our results open numerous possibilities to create long-range molecules between ultracold ground state atoms.
  arXiv  Detail & Related papers  (2023-03-14T09:01:19Z)
• 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)
• Rotational properties of two interacting cold polar molecules: linear, symmetric, and asymmetric tops [0.0]
  We model the molecules as quantum rigid rotors to take their rotational degrees of freedom into account. We find that the properties of the molecules depend strongly on the field's direction at short separations. The latter provides insight into the possible effects of accounting for rotational degrees of freedom in molecular dipolar gases.
  arXiv  Detail & Related papers  (2023-03-03T20:17:56Z)
• DiffBP: Generative Diffusion of 3D Molecules for Target Protein Binding [51.970607704953096]
  Previous works usually generate atoms in an auto-regressive way, where element types and 3D coordinates of atoms are generated one by one. In real-world molecular systems, the interactions among atoms in an entire molecule are global, leading to the energy function pair-coupled among atoms. In this work, a generative diffusion model for molecular 3D structures based on target proteins is established, at a full-atom level in a non-autoregressive way.
  arXiv  Detail & Related papers  (2022-11-21T07:02:15Z)
• Scalable Fragment-Based 3D Molecular Design with Reinforcement Learning [68.8204255655161]
  We introduce a novel framework for scalable 3D design that uses a hierarchical agent to build molecules. In a variety of experiments, we show that our agent, guided only by energy considerations, can efficiently learn to produce molecules with over 100 atoms.
  arXiv  Detail & Related papers  (2022-02-01T18:54:24Z)
• High-resolution 'magic'-field spectroscopy on trapped polyatomic molecules [62.997667081978825]
  Rapid progress in cooling and trapping of molecules has enabled first experiments on high resolution spectroscopy of trapped diatomic molecules. Extending this work to polyatomic molecules provides unique opportunities due to more complex geometries and additional internal degrees of freedom.
  arXiv  Detail & Related papers  (2021-10-21T15:46:17Z)
• Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules [60.17174832243075]
  We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods. We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
  arXiv  Detail & Related papers  (2021-07-06T15:34:00Z)
• Interaction between vortex beams and diatomic molecules with rotation [0.0]
  We study the diatomic molecular states in Hund's coupling basis and express interaction Hamiltonian in form of spherical harmonics expansion. Results indicate that VB could provide new methods for preparing and measuring the diatomic molecular states.
  arXiv  Detail & Related papers  (2020-12-30T17:08:19Z)
• 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)

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.