Optical Trapping of a Polyatomic Molecule in an ℓ-Type Parity Doublet State.

  title={Optical Trapping of a Polyatomic Molecule in an ℓ-Type Parity Doublet State.},
  author={Christian Hallas and Nathaniel B. Vilas and Lo{\"i}c Anderegg and Paige Robichaud and Andrew Winnicki and Chaoqun Zhang and Lan Cheng and John M. Doyle},
  journal={Physical review letters},
  volume={130 15},
We report optical trapping of a polyatomic molecule, calcium monohydroxide (CaOH). CaOH molecules from a magneto-optical trap are sub-Doppler laser cooled to 20(3)  μK in free space and loaded into an optical dipole trap. We attain an in-trap molecule number density of 3(1)×10^{9}  cm^{-3} at a temperature of 57(8)  μK. Trapped CaOH molecules are optically pumped into an excited vibrational bending mode, whose ℓ-type parity doublet structure is a potential resource for a wide range of proposed… 

Figures and Tables from this paper

Blue-Detuned Magneto-optical Trap of Molecules

Direct laser cooling of molecules has reached a phase-space density exceeding 10^{-6} in optical traps but with rather small molecular numbers. To progress toward quantum degeneracy, a mechanism that

Toward improved loading, cooling, and trapping of molecules in magneto-optical traps

Recent experiments have demonstrated direct cooling and trapping of diatomic and triatomic molecules in magneto-optical traps (MOTs). However, even the best molecular MOTs to date still have density

Dipolar spin-exchange and entanglement between molecules in an optical tweezer array

Due to their intrinsic electric dipole moments and rich internal structure, ultracold polar molecules are promising candidate qubits for quantum computing and for a wide range of quantum simulations.

Comprehensive Characterization of a State-of-the-Art Apparatus for Cold Electromagnetic Dysprosium Dipoles

We developed a new advanced ultra-cold Dysprosium (Dy) apparatus, which incorporates a quantum gas microscope (QGM) with a resolution of a quarter micrometer. The QGM and the cooling and trapping

Quantum Control of Trapped Polyatomic Molecules for eEDM Searches


Coherent Optical Creation of a Single Molecule

We report coherent association of atoms into a single weakly bound NaCs molecule in an optical tweezer through an optical Raman transition. The Raman technique uses a deeply bound electronic excited

Magneto-optical trapping and sub-Doppler cooling of a polyatomic molecule

Laser cooling and trapping1,2, and magneto-optical trapping methods in particular2, have enabled groundbreaking advances in science, including Bose–Einstein condensation3–5, quantum computation with

Heteronuclear molecules in an optical dipole trap

We report on the creation and characterization of heteronuclear KRb Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of K-40 and Rb-87 atoms, we create as many as

Polarization Enhanced Deep Optical Dipole Trapping of Λ-Cooled Polar Molecules.

We demonstrate loading of SrF molecules into an optical dipole trap (ODT) via in-trap Λ-enhanced gray molasses cooling. We find that this cooling can be optimized by a proper choice of relative ODT

Laser-cooled polyatomic molecules for improved electron electric dipole moment searches

Doppler and Sisyphus cooling of 174YbOH are achieved and studied. This polyatomic molecule has high sensitivity to physics beyond the Standard Model and represents a new class of species for future

Ultracold Dipolar Gas of Fermionic 23Na40 K Molecules in Their Absolute Ground State.

We report on the creation of an ultracold dipolar gas of fermionic 23Na40 K molecules in their absolute rovibrational and hyperfine ground state. Starting from weakly bound Feshbach molecules, we

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.

Precision Measurement of Time-Reversal Symmetry Violation with Laser-Cooled Polyatomic Molecules.

It is shown that by utilizing the internal degrees of freedom present only in molecules with at least three atoms, these features can be attained simultaneously with molecules that have simple structure and are amenable to laser cooling and trapping.

Establishing a nearly closed cycling transition in a polyatomic molecule

We study optical cycling in the polar free radical calcium monohydroxide (CaOH) and establish an experimental path towards scattering >$10^4$ photons. We report vibrational branching ratio

Prospects for laser cooling of polyatomic molecules with increasing complexity

Optical cycling transitions and direct laser cooling have recently been demonstrated for a number of alkaline-earth dimers and trimer molecules. This is made possible by diagonal Frank-Condon factors