Efficient conversion of closed-channel dominated Feshbach molecules of ${}^{23}$Na${}^{40}$K to their absolute ground state

Abstract

We demonstrate the transfer of ${}^{23}$Na${}^{40}$K molecules from a closed-channel dominated Feshbach-molecule state to the absolute ground state. The Feshbach molecules are initially created from a gas of sodium and potassium atoms via adiabatic ramping over a Feshbach resonance at 78.3G. The molecules are then transferred to the absolute ground state using stimulated Raman adiabatic passage with an intermediate state in the spin-orbit-coupled complex $|c^3{\Sigma }^{+},v=35,J=1⟩\sim |B^1\Pi ,v=12,J=1⟩$. Our measurements show that the pump transition dipole moment linearly increases with the closed-channel fraction. Thus, the pump-beam intensity can be two orders of magnitude lower than is necessary with open-channel dominated Feshbach molecules. We also demonstrate that the phase noise of the Raman lasers can be reduced by filter cavities, significantly improving the transfer efficiency.

arXiv comment8 pages, 7 figures

References in corpus (35)

• A High Phase-Space-Density Gas of Polar Molecules
• Search for New Physics with Atoms and Molecules
• Stimulated Raman adiabatic passage in physics, chemistry and beyond
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• High-fidelity control and entanglement of Rydberg atom qubits
• Molecules cooled below the Doppler limit
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Calculation of accurate permanent dipole moments of the lowest ${}^{1,3}{\Sigma }^{+}$ states of heteronuclear alkali dimers using extended basis sets
• Ultracold dense gas of deeply bound heteronuclear molecules
• Radio Frequency Magneto-Optical Trapping of CaF with High Density
• Reactions of ultracold alkali metal dimers
• 3-D Magneto-Optical Trap of Yttrium Monoxide
• Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K
• Long-Lived Ultracold Molecules with Electric and Magnetic Dipole Moments
• Creation of a low-entropy quantum gas of polar molecules in an optical lattice
• Optoelectrical cooling of polar molecules to sub-millikelvin temperatures
• Assembly of a rovibrational ground state molecule in an optical tweezer
• Collisions of ultracold ^{23}Na^{87}Rb molecules with controlled chemical reactivities
• Modeling the adiabatic creation of ultracold, polar ${}^{23}\mathrm{N}{\mathrm{a}}^{40}\mathrm{K}$ molecules
• Laser cooled molecules
• A robust entangling gate for polar molecules using magnetic and microwave fields
• Molecular spectroscopy for ground-state transfer of ultracold RbCs molecules
• Extending rotational coherence of interacting polar molecules in a spin-decoupled magic trap
• Universal gate-set for trapped-ion qubits using a narrow linewidth diode laser
• Two-Photon Pathway to Ultracold Ground State Molecules of ${}^{23}$Na${}^{40}$K
• Observation of interference between resonant and detuned STIRAP in the adiabatic creation of ${}^{23}$Na${}^{40}$K molecules
• Tune-out and magic wavelengths for ground-state ${}^{23}$Na${}^{40}$K molecules
• A Simple, Versatile Laser System for the Creation of Ultracold Ground State Molecules
• Simple phase noise measurement scheme for cavity-stabilized laser systems
• Singlet Pathway to the Ground State of Ultracold Polar Molecules
• High Resolution Molecular Spectroscopy for Producing Ultracold Absolute Ground-State ${}^{23}$Na${}^{87}$Rb Molecules
• A pathway to ultracold bosonic ${}^{23}{\text{Na}}^{39}\text{K}$ ground state molecules

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• Diatomic molecules of alkali-metal and alkaline-earth-metal atoms: interaction potentials, dipole moments, and polarizabilities
• Pound-Drever-Hall Feedforward: Laser Phase Noise Suppression beyond Feedback
• Efficient Pathway to NaCs Ground State Molecules
• Enhanced quantum state transfer via feedforward cancellation of optical phase noise
• Measurement and feed-forward correction of the fast phase noise of lasers
• Resonance-to-bound transition of ${}^5$He in neutron matter and its analogy with heteronuclear Feshbach molecule
• Genetics-based deperturbation analysis for the spin-orbit coupled ${\mathrm{A}}^1{\Sigma }^{+}$ and ${\mathrm{b}}^3{\Pi }_{0^{+}}$ states of LiRb
• Feedforward Cancellation of High-Frequency Phase Noise in Frequency-Doubled Lasers