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Updated: Sep 13, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
First-Order Phase Transition in Atom-Molecule Quantum Degenerate Mixtures with Coherent Three-Body Recombination
G A Bougas1, A Vardi2,3, H R Sadeghpour3
1Missouri University of Science and Technology, Department of Physics and LAMOR, Rolla, Missouri 65409, USA.
Abstract:
We map the phase diagram of a two-mode atom-molecule Bose-Einstein condensate with Fano-Feshbach and coherent three-body recombination (cTBR) terms. The standard second-order phase transition observed as the molecular energy is tuned through the Fano-Feshbach resonance is replaced by a first-order transition when cTBR becomes prominent, due to a double-well structure in the free energy landscape. This transition is associated with atom-molecule entanglement, bistability, and molecular metastability. Our results establish cTBR as a powerful knob for quantum state engineering and control of reaction dynamics in ultracold chemistry.
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