Parametric tuning of dynamical phase transitions in ultracold reactions
arxiv(2024)
摘要
Advances in ultracold chemistry have led to the possibility of a coherent
transformation between ultracold atoms and molecules including between
completely bosonic condensates. Such transformations are enabled by the
magneto-association of atoms at a Feshbach resonance which results in a passage
through a quantum critical point. In this study, we show that the presence of
generic interaction between the formed molecules can fundamentally alter the
nature of the critical point, change the yield of the reaction and the order of
the consequent phase transition. We find that the correlations introduced by
this rather general interaction induce nontrivial many-body physics such as
coherent oscillations between atoms and molecules, and a selective formation of
squeezed molecular quantum states and quantum cat states. We provide analytical
and numerical descriptions of these many-body effects, along with scaling laws
for the reaction yield in both the adiabatic and non-adiabatic regimes, and
highlight the potential experimental relevance in quantum sensing.
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