Magneto-Optical Trapping and Sub-Doppler Cooling of a Polyatomic Molecule

Vilas, Nathaniel B.; Hallas, Christian; Anderegg, Loïc; Robichaud, Paige; Winnicki, Andrew; Mitra, Debayan; Doyle, John M.

doi:10.48550/arxiv.2112.08349

Cited by 10 publications

(11 citation statements)

References 50 publications

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“…Laser cooling was demonstrated for SrOH [99] and YbOH [100], while for CaOH, magneto-optical compression in one dimension [81] (Fig. 3(d)) and trapping in a 3D MOT along with sub-Doppler cooling was demonstrated [101]. Linear triatomic molecules feature a bending vibrational mode.…”

Section: Direct Laser Coolingmentioning

confidence: 91%

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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Section: Direct Laser Coolingmentioning

confidence: 91%

Quantum control of molecules for fundamental physics

Mitra,

Leung,

Zelevinsky

2022

Preprint

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“…Since the first laser cooling of a diatomic molecule in 2010 [292], the community has seen tremendous advances, including loading molecules into optical traps suitable for precision measurement [293,294]. Furthermore, these techniques are now starting to be implemented in polyatomic molecules as well [295]. Polyatomic molecules offer unique advantages for CP-violation searches [283,296,297], but their complex structure makes them a challenge.…”

Section: R and D For Ion Trapsmentioning

confidence: 99%

Snowmass 2021: Quantum Sensors for HEP Science -- Interferometers, Mechanics, Traps, and Clocks

Carney¹,

Cecil²,

Ellis³

et al. 2022

Preprint

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A wide range of quantum sensing technologies are rapidly being integrated into the experimental portfolio of the high energy physics community. Here we focus on sensing with atomic interferometers; mechanical devices read out with optical or microwave fields; precision spectroscopic methods with atomic, nuclear, and molecular systems; and trapped atoms and ions. We give a variety of detection targets relevant to particle physics for which these systems are uniquely poised to contribute. This includes experiments at the precision frontier like measurements of the electron dipole moment and electromagnetic fine structure constant and searches for fifth forces and modifications of Newton's law of gravity at micron-to-millimeter scales. It also includes experiments relevant to the cosmic frontier, especially searches for gravitional waves and a wide variety of dark matter candidates spanning heavy, WIMP-scale, light, and ultra-light mass ranges. We emphasize here the need for more developments both in sensor technology and integration into the broader particle physics community.

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“…In exchange for this increase in complexity, molecules provide enhanced sensitivity for fundamental precision measurements [8][9][10], longer coherence times for quantum information [11][12][13], and tunable long-range interactions for quantum simulators [12,14]. The technique of buffer gas cooling [15,16] has enabled direct laser cooling of molecules, including several diatomic [17][18][19][20][21], triatomic [10,22,23], and symmetric top [24] species. We add the alkaline-earth monohydride CaH to this growing list.…”

Section: Introductionmentioning

confidence: 99%

Direct laser cooling of calcium monohydride molecules

Vázquez-Carson,

Sun,

Dai

et al. 2022

Preprint

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We demonstrate optical cycling and sub-Doppler laser cooling of a cryogenic buffer-gas beam of calcium monohydride (CaH) molecules. We measure vibrational branching ratios for laser cooling transitions for both excited electronic states A and B. We measure further that repeated photon scattering via the A ← X transition is achievable at a rate of ∼ 1.6 × 10 6 photons/s and demonstrate the interaction-time limited scattering of ∼ 200 photons by repumping the largest vibrational decay channel. We also demonstrate the ability to sub-Doppler cool a molecular beam of CaH through the magnetically assisted Sisyphus effect. Using a standing wave of light, we lower the molecular beam's transverse temperature from 12.2(1.2) mK to 5.7(1.1) mK. We compare these results to sub-Doppler forces modeled using optical Bloch equations and Monte Carlo simulations of the molecular beam trajectories. This work establishes a clear pathway for creating a magneto-optical trap (MOT) of CaH molecules. Such a MOT could serve as a starting point for production of ultracold hydrogen gas via dissociation of a trapped CaH cloud.

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Magneto-Optical Trapping and Sub-Doppler Cooling of a Polyatomic Molecule

Cited by 10 publications

References 50 publications

Quantum control of molecules for fundamental physics

Quantum control of molecules for fundamental physics

Snowmass 2021: Quantum Sensors for HEP Science -- Interferometers, Mechanics, Traps, and Clocks

Direct laser cooling of calcium monohydride molecules

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