Control of reactive collisions by quantum interference
- URL: http://arxiv.org/abs/2109.03944v2
- Date: Thu, 10 Mar 2022 21:14:44 GMT
- Title: Control of reactive collisions by quantum interference
- Authors: Hyungmok Son, Juliana J. Park, Yu-Kun Lu, Alan O. Jamison, Tijs
Karman, Wolfgang Ketterle
- Abstract summary: In this study, we achieved magnetic control of reactive scattering in an ultracold mixture of $23$Na atoms and $23$Na$6$Li molecules.
By controlling the phase of the scattering wave function via a Feshbach resonance, we modified the loss rate by more than a factor of $100$, from far below to far above the universal limit.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: In this study, we achieved magnetic control of reactive scattering in an
ultracold mixture of $^{23}$Na atoms and $^{23}$Na$^{6}$Li molecules. In most
molecular collisions, particles react or are lost near short range with unity
probability, leading to the so-called universal rate. By contrast, the
Na{+}NaLi system was shown to have only $\sim4\%$ loss probability in a fully
spin-polarized state. By controlling the phase of the scattering wave function
via a Feshbach resonance, we modified the loss rate by more than a factor of
$100$, from far below to far above the universal limit. The results are
explained in analogy with an optical Fabry-Perot resonator by interference of
reflections at short and long range. Our work demonstrates quantum control of
chemistry by magnetic fields with the full dynamic range predicted by our
models.
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