An Ultracold Gas of Bosonic ²³ textrmNa³⁹ textrmK\n Ground-State Molecules

2020/08/12 by Kai K. Voges, Philipp Gersema, Voges, Kai K. +11
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas)

paper · pdf · doi:10.48550/arxiv.2008.05439

openalex publication_date 2020/08/12 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28

Abstract

We report the creation of ultracold bosonic dipolar\n²³ textrmNa³⁹ textrmK molecules in their absolute rovibrational\nground state. Starting from weakly bound molecules immersed in an ultracold\natomic mixture, we coherently transfer the dimers to the rovibrational ground\nstate using an adiabatic Raman passage. We analyze the two-body decay in a pure\nmolecular sample and in molecule-atom mixtures and find an unexpectedly low\ntwo-body decay coefficient for collisions between molecules and\n³⁹ textrmK atoms in a selected hyperfine state. The preparation of\nbosonic ²³ textrmNa³⁹ textrmK molecules opens the way for future\ncomparisons between fermionic and bosonic ultracold ground-state molecules of\nthe same chemical species.\n

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