Control of reactive collisions by quantum interference

Autor: Hyungmok Son, Juliana J. Park, Yu-Kun Lu, Alan O. Jamison, Tijs Karman, Wolfgang Ketterle
Rok vydání: 2022
Předmět:
Zdroj: Science, 375, 1006-1010
Science, 375, 6584, pp. 1006-1010
ISSN: 1095-9203
0036-8075
1006-1010
DOI: 10.1126/science.abl7257
Popis: 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 ~4% 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.
Databáze: OpenAIRE
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