Microwave trap for atoms and molecules

Wright, S. C.; Wall, T. E.; Tarbutt, M. R.

doi:10.1103/physrevresearch.1.033035

Cited by 17 publications

(9 citation statements)

References 63 publications

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“…Induced interactions via microwave dressing of molecules is a crucial component of several proposals to create exotic states of matter in bulk [2,[23][24][25] and lattice quantum gases [26,27]. In addition, standing-wave microwave fields in resonant cavities have been proposed to trap polar molecules [28][29][30]. Furthermore, engineering repulsive interactions via microwave dressing can potentially shield molecules from binary collisions [2,23,[31][32][33][34], which limit the lifetime of bulk molecular gases in both chemically reactive [35,36] and nonreactive species [10,17,[37][38][39] in the presence of trapping light [40][41][42].…”

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confidence: 99%

Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing

Yan

Park

et al. 2020

Phys. Rev. Lett.

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We demonstrate microwave dressing on ultracold, fermionic 23 Na 40 K ground-state molecules and observe resonant dipolar collisions with cross sections exceeding 3 times the s-wave unitarity limit. The origin of these interactions is the resonant alignment of the approaching molecules' dipoles along the intermolecular axis, which leads to strong attraction. We explain our observations with a conceptually simple two-state picture based on the Condon approximation. Furthermore, we perform coupled-channel calculations that agree well with the experimentally observed collision rates. The resonant microwaveinduced collisions found here enable controlled, strong interactions between molecules, of immediate use for experiments in optical lattices.

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confidence: 99%

Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing

Yan

Park

et al. 2020

Phys. Rev. Lett.

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“…Notably, collisional cooling has been recently demonstrated for fermionic NaLi molecules with Na atoms where the molecular phase-space density was increased by a factor of 20 [34], and rapid thermalization has been observed for fermionic KRb Feshbach molecules with K and Rb atoms [35]. Similar ideas are being explored for CaF [36][37][38], SrF [39,40], O 2 [41], and OH [42] with degenerate gases of alkali-metal atoms. For charged particles, the criterion for direct elastic collisions is lifted since this can be effectively mediated through coupled motional modes in a Coulomb crystal.…”

Section: Molecule Assembly and Sympathetic Coolingmentioning

confidence: 83%

Quantum control of molecules for fundamental physics

Mitra,

Leung,

Zelevinsky

2022

Preprint

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The extraordinary success in laser cooling, trapping, and coherent manipulation of atoms has energized the efforts in extending this exquisite control to molecules. Not only are molecules ubiquitous in nature, but the control of their quantum states offers unparalleled access to fundamental constants and possible physics beyond the Standard Model. Quantum state manipulation of molecules can enable high-precision measurements including tests of fundamental symmetries and searches for new particles and fields. At the same time, their complex internal structure presents experimental challenges to overcome in order to gain sensitivity to new physics. In this Perspective, we review recent developments in this thriving new field. Moreover, throughout the text we discuss many current and future research directions that have the potential to place molecules at the forefront of fundamental science.

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“…The list of laser cooled molecules is continuously growing with the recent addition of polyatomic species [45] (SrOH [46], CaOH [47], CaOCH 3 [48], YbOH [49]. To enter the ultracold regime, subsequent cooling and trapping techniques, such as magnetic trapping, microwave trapping, dipole trapping and evaporative cooling of molecules, have been demonstrated [50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy on the $A^1Π\leftarrow X^1Σ^+$ Transition of Buffer-Gas Cooled AlCl

Daniel,

Wang,

Rodriguez

et al. 2021

Preprint

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Aluminum monochloride (AlCl) has been proposed as an excellent candidate for laser cooling.Here we present absorption spectroscopy measurements on the X 1 Σ + → A 1 Π transition in AlCl inside a cryogenic helium buffer-gas beam cell. The high resolution absorption data enables a rigorous, quantitative comparison with our high-level ab initio calculations of the electronic and rovibronic energies, providing a comprehensive picture of the AlCl quantum structure. The combination of high resolution spectral data and theory permits the evaluation of spectroscopic constants and associated properties, like equilibrium bond length, with an order of magnitude higher precision. Based on the measured molecular equilibrium constants of the A 1 Π state, we estimate a Franck-Condon factor of the X 1 Σ + → A 1 Π of 99.88%, which confirms that AlCl is amenable to laser cooling.

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Microwave trap for atoms and molecules

Cited by 17 publications

References 63 publications

Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing

Resonant Dipolar Collisions of Ultracold Molecules Induced by Microwave Dressing

Quantum control of molecules for fundamental physics

Spectroscopy on the $A^1Π\leftarrow X^1Σ^+$ Transition of Buffer-Gas Cooled AlCl

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