This paper reports observations consistent with a phase transition from a polaronic to a molecular phase in a density-matched degenerate Bose-Fermi mixture. The condensate fraction, acting as the order parameter, is depleted by interactions, leading to the formation of a molecular Fermi gas. This transition represents a novel phenomenon distinct from the BEC-BCS crossover. By driving the system through this transition, the authors produce sodium-potassium molecules with a large dipole moment in the quantum-degenerate regime.
Publisher
Nature Physics
Published On
May 01, 2023
Authors
Marcel Duda, Xing-Yan Chen, Andreas Schindewolf, Roman Bause, Jonas von Milczewski, Richard Schmidt, Immanuel Bloch, Xin-Yu Luo
Tags
Bose-Fermi mixture
phase transition
polaronic phase
molecular phase
quantum-degenerate
sodium-potassium molecules
dipole moment
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