Efficient conversion of closed-channel-dominated Feshbach molecules of (NaK)-Na-23-K-40 to their absolute ground state

Bause, Roman; Kamijo, Akira; Chen, Xing-Yan; Duda, Marcel; Schindewolf, Andreas; Bloch, Immanuel und Luo, Xin-Yu (2021): Efficient conversion of closed-channel-dominated Feshbach molecules of (NaK)-Na-23-K-40 to their absolute ground state. In: Physical Review A, Bd. 104, Nr. 4, 43321

Abstract

We demonstrate the transfer of (NaK)-Na-23-K-40 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 78.3 G. 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 vertical bar c(3)Sigma(+), upsilon = 35, J = 1 > - vertical bar B-1 Pi, upsilon = 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2469-9926
• Sprache: Englisch