Resonant collisional shielding of reactive molecules using electric fields

  title={Resonant collisional shielding of reactive molecules using electric fields},
  author={Kyle Matsuda and Luigi De Marco and Jun-Ru Li and William G. Tobias and Giacomo Valtolina and Goulven Qu{\'e}m{\'e}ner and Jun Ye},
  pages={1324 - 1327}
Electric field shielding of ultracold molecules Because reactive collisions limit the lifetime of ultracold molecular ensembles, controlling chemical reactivity at ultralow temperatures has been a long-standing goal. Using large electric fields that trigger resonant dipolar interactions between potassium-rubidium molecules trapped in a quasi–two-dimensional geometry, Matsuda et al. report suppression of the reactive loss rate in the vicinity of the dipolar-mediated resonances by up to an order… 

Collisions between Ultracold Molecules and Atoms in a Magnetic Trap.

A single-channel loss model based on quantum defect theory suggests a short-range loss parameter close to unity for rotationally excited molecules, but below 0.04 for molecules in the rotational ground state.

Exact Two-Body Solutions and Quantum Defect Theory of Polar Molecular Gases with Van der Waals Potentials

In a recent experiment [Matsuda et al, Science 370, 1324 (2020)], a quasi two-dimensional (2D), long-lived and strongly interacting diatomic polar molecular gas was successfully prepared via

Efficient Pathway to NaCs Ground State Molecules

We present a study of two-photon pathways for the transfer of NaCs molecules to their rovibrational ground state. Starting from NaCs Feshbach molecules, we perform bound-bound excited state

Quantum state–resolved molecular dipolar collisions over four decades of energy

Collisions between cold polar molecules represent a fascinating research frontier but have proven hard to probe experimentally. We report measurements of inelastic cross sections for collisions

Anisotropic acoustics in dipolar Fermi gases

We consider plane wave modes in ultracold, but not quantum degenerate, dipolar Fermi gases in the hydrodynamic limit. Longitudinal waves present anisotropies in both the speed of sound and their

Simulation of the hyperfine-rotational spectrum of BrF due to electric and nuclear magnetic dipole transitions

The transition dipole of the hyperfine-rotation spectra of <em>J</em> = 1←0 within the vibronic ground (<em>X</em><sup>1</sup>Σ, <em>v</em> = 0) state of BrF are derived, and thus, the transition

Resonances in Non-universal Dipolar Collisions

  • T. Karman
  • Physics
    The journal of physical chemistry. A
  • 2023
Scattering resonances due to the dipole–dipole interaction between ultracold molecules, induced by static or microwave fields, are studied theoretically. We develop a method for coupled-channel

Field-linked resonances of polar molecules

Scattering resonances are an essential tool for controlling the interactions of ultracold atoms and molecules. However, conventional Feshbach scattering resonances1, which have been extensively

A Feshbach resonance in collisions between triplet ground-state molecules

Collisional resonances are important tools that have been used to modify interactions in ultracold gases, for realizing previously unknown Hamiltonians in quantum simulations1, for creating molecules

Tunable itinerant spin dynamics with polar molecules

Strongly interacting spins underlie many intriguing phenomena and applications1–4 ranging from magnetism to quantum information processing. Interacting spins combined with motion show exotic spin



Dipolar collisions of polar molecules in the quantum regime

It is shown how the long-range dipolar interaction can be used for electric-field control of chemical reaction rates in an ultracold gas of polar molecules, and how this dependence can be understood in a relatively simple model based on quantum threshold laws for the scattering of fermionic polar molecules.

Shielding Σ2 ultracold dipolar molecular collisions with electric fields

The prospects for shielding ultracold, paramagnetic, dipolar molecules from inelastic and chemical collisions are investigated. Molecules placed in their first rotationally excited states are found

Dipolar Collisions of Ultracold Ground-State Bosonic Molecules

The dipolar collision between ultracold polar molecules is an important topic both by its own right from the fundamental point of view and for the successful exploration of many-body physics with

Dipolar evaporation of reactive molecules to below the Fermi temperature

These results demonstrate a general strategy for achieving quantum degeneracy in dipolar molecular gases where strong, long-range, and anisotropic dipolar interactions can drive the emergence of exotic many-body phases, such as interlayer pairing and p-wave superfluidity.

Controlling the quantum stereodynamics of ultracold bimolecular reactions

Molecular collisions in the quantum regime represent a new opportunity to explore chemical reactions. Recently, atom-exchange reactions were observed in a trapped ultracold gas of KRb molecules. In

Tuning ultracold collisions of excited rotational dipolar molecules

We investigate the ultracold collisions of rotationally excited dipolarmolecules in free-space, taking the hetero-nuclear bi-alkalimolecule of KRb as an example.We show that we can sharply tune the

Cold controlled chemistry.

  • R. Krems
  • Physics
    Physical chemistry chemical physics : PCCP
  • 2008
It is demonstrated that collisions of molecules at temperatures below 1 K can be manipulated by external electromagnetic fields and to discuss possible applications of cold controlled chemistry.

Cold heteromolecular dipolar collisions.

The theory presented here represents the first such analysis of collisions between a (2)Π radical and a closed-shell polyatomic molecule and is in agreement with the measured value at zero external electric field.

Dynamics of ultracold molecules in confined geometry and electric field

We present a time-independent quantum formalism to describe the dynamics of molecules with permanent electric dipole moments in a two-dimensional confined geometry such as a one-dimensional optical

Strong dependence of ultracold chemical rates on electric dipole moments

We use the quantum threshold laws combined with a classical capture model to provide an analytical estimate of the chemical quenching cross sections and rate coefficients of two colliding particles