A cryofuge for cold-collision experiments with slow polar molecules

@article{Wu2017ACF,
  title={A cryofuge for cold-collision experiments with slow polar molecules},
  author={Xing Wu and Thomas Gantner and M. Koller and Martin Zeppenfeld and Sotir Chervenkov and Gerhard Rempe},
  journal={Science},
  year={2017},
  volume={358},
  pages={645 - 648}
}
Cooling molecules in the spin cycle A block of ice might look solid, but the molecules inside it are shaking vigorously. Slowing molecules all the way down in the laboratory offers enticing prospects to study and apply their quantum behavior. However, methods to cool dense samples to the necessary temperatures below 1 K have tended to be restricted to rather specialized diatomics. Wu et al. present a general cooling technique that applies to a wide range of conventional polar molecules such as… 

Long-term trapping of Stark-decelerated molecules

Trapped cold molecules represent attractive systems for precision-spectroscopic studies and for investigations of cold collisions and chemical reactions. However, achieving their confinement for

Direct laser cooling of a symmetric top molecule

Results demonstrate that the use of proper ro-vibronic transitions enables laser cooling of nonlinear molecules, thereby opening a path to efficient cooling of chiral molecules and, eventually, optical tweezer arrays of complex polyatomic species.

Sub-Doppler Cooling and Compressed Trapping of YO Molecules at μK Temperatures.

The magnetic insensitivity enables the spatial compression of the molecular cloud by alternating GMC and MOT under the continuous operation of the quadrupole magnetic field, and a combination of these techniques produces a laser-cooled molecular sample with the highest phase space density in free space.

Laser cooling and trapping molecules

  • D. McCarron
  • Physics
    Journal of Physics B: Atomic, Molecular and Optical Physics
  • 2018
The extension of laser cooling and trapping techniques from atoms to molecules is currently the subject of intense and growing interest. Molecular laser cooling and trapping offers a general

Buffer-gas cooling, high-resolution spectroscopy, and optical cycling of barium monofluoride molecules

We demonstrate buffer-gas cooling, high-resolution spectroscopy and cycling fluorescence of cold barium monofluoride (BaF) molecules. Our source produces an intense and internally cold molecular beam

Bimolecular Chemistry in the Ultracold Regime.

  • Yu LiuK. Ni
  • Chemistry
    Annual review of physical chemistry
  • 2021
This review covers recent developments in studying bimolecular chemistry at ultralow temperatures and discusses a series of studies on the reaction KRb + KRb → K2 + Rb2 initiated below 1 K, including the direct observation of a long-lived complex and a test of the statistical model using the complete quantum state distribution of the products.

Buffer-gas cooling of molecules in the low-density regime: comparison between simulation and experiment

A numerical approach based on a trajectory analysis, with molecules performing a random walk in the cell due to collisions with a homogeneous buffer gas, which can reproduce experimental flux and velocity distributions of molecules emerging from the buffer gas cell for varying buffer gas densities.

Microwave trap for atoms and molecules

We demonstrate a trap that confines polarizable particles around the antinode of a standing-wave microwave field. The trap relies only on the polarizability of the particles far from any resonances,

Molecular collisions: From near-cold to ultra-cold

In the past two decades, the revolutionary technologies of creating cold and ultracold molecules have provided cutting-edge experiments for studying the fundamental phenomena of collision physics. To

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.

References

SHOWING 1-10 OF 54 REFERENCES

Thermometry of Guided Molecular Beams from a Cryogenic Buffer-Gas Cell.

Comparison of the rotational and translational temperatures provides evidence of faster rotational thermalisation for the CH3 F/He system in the limit of low He density.

A High Phase-Space-Density Gas of Polar Molecules

An ultracold dense gas of potassium-rubidium (40K87Rb) polar molecules is created using a single step of STIRAP with two-frequency laser irradiation to coherently transfer extremely weakly bound KRb molecules to the rovibrational ground state of either the triplet or the singlet electronic ground molecular potential.

Ultracold molecules and ultracold chemistry

The recent development of a range of new methods for producing samples of gas-phase molecules that are translationally cold ( K) or ultracold ( mK) is driving efforts to study reactive and inelastic

Electrostatic extraction of cold molecules from a cryogenic reservoir.

A method which delivers a continuous, high-density beam of slow and internally cold polar molecules, resulting in single-state populations up to (82+/-10%) for H2CO and ND3.

Quantum-State Controlled Chemical Reactions of Ultracold Potassium-Rubidium Molecules

Experimental evidence for exothermic atom-exchange chemical reactions is reported, starting with an optically trapped near–quantum-degenerate gas of polar 40K87Rb molecules prepared in their absolute ground state.

Magnetic trapping of calcium monohydride molecules at millikelvin temperatures

Recent advances in the magnetic trapping and evaporative cooling of atoms to nanokelvin temperatures have opened important areas of research, such as Bose–Einstein condensation and ultracold atomic

Observation of Resonances in Penning Ionization Reactions at Sub-Kelvin Temperatures in Merged Beams

The realization of merged neutral supersonic beams and the manifestation of clear nonclassical effects in the resulting reactions are reported, which should be widely applicable to many canonical chemical reactions.

Continuous centrifuge decelerator for polar molecules.

A centrifugal force is employed to produce a continuous molecular beam with a high flux at near-zero velocities to demonstrate deceleration of three electrically guided molecular species, CH3F, CF3H, and CF3CCH.

Magnetic Trapping of Cold Methyl Radicals.

The demonstrated trapping capability of methyl radicals opens up various possibilities for realizing ultracold ensembles of molecules towards Bose-Einstein condensation of polyatomic molecules and investigations of reactions governed by quantum statistics.

Storage and adiabatic cooling of polar molecules in a microstructured trap.

The trap combines all ingredients for opto-electrical cooling, which, together with the extraordinarily long storage times, brings field-controlled quantum-mechanical collision and reaction experiments within reach.
...