High Phase-Space Density of Laser-Cooled Molecules in an Optical Lattice

Abstract

We report laser cooling and trapping of yttrium monoxide (YO) molecules in an optical lattice. We show that gray molasses cooling remains exceptionally efficient for YO molecules inside the lattice with a molecule temperature as low as 6.1(6) $\mu$K. This approach has produced a trapped sample of 1200 molecules, with a peak spatial density of $\sim 1.2\times 10^{10}$ cm${}^{-3}$, and a peak phase-space density of $\sim 3.1\times 10^{-6}$. By adiabatically ramping down the lattice depth, we cool the molecules further to 1.0(2) $\mu$K, twenty times colder than previously reported for laser-cooled molecules in a trap.

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References in corpus (7)

• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Magneto-optical trapping of a diatomic molecule
• Schemes for robust quantum computation with polar molecules
• Radio Frequency Magneto-Optical Trapping of CaF with High Density
• Rotational state microwave mixing for laser cooling of complex diatomic molecules
• Three-dimensional Doppler, polarization-gradient, and magneto-optical forces for atoms and molecules with dark states
• Collisions Between Ultracold Molecules and Atoms in a Magnetic Trap

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