Quantum Science Seminar #37 - Cold Molecules

"Collisions between cold molecules in a superconducting magnetic trap"

February 25, 2021

Edvardas Narevicius - Weizmann Institute of Science
(Rehovot - Israel)

Collisions between cold molecules are essential for studying fundamental aspects of quantum chemistry, and may enable formation of quantum degenerate molecular matter by evaporative cooling. However, collisions between trapped, naturally occurring molecules have so far eluded direct observation due to the low collision rates of dilute samples. I will present our experiment where we directly observed collisions between cold, trapped molecules, achieved without the need of laser cooling. We magnetically capture molecular oxygen in a 0.8K x kB deep superconducting trap, and set bounds on the ratio between the elastic and inelastic scattering rates, the key parameter determining the feasibility of evaporative cooling. We further co-trap and identify collisions between atoms and molecules, paving the way to studies of cold interspecies collisions in a magnetic trap.


[1] Yair Segev, Martin Pitzer, Michael Karpov, Nitzan Akerman, Julia Narevicius, and Edvardas Narevicius

“Collisions between cold molecules in a superconducting magnetic trap”

Nature 572, 7768 (2019)

[2] A. Klein, Y. Shagam, W. Skomorowski, P.S. Zuchowski, M. Pawlak, L. M. C. Janssen, N. Moiseyev, S. Y. T. van de Meerakker, A. van der Avoird, C. P. Koch, and E. Narevicius

“Directly probing anisotropy in atom-molecule collisions through quantum scattering resonances”

Nature Physics 13, 35 (2017)

Access the live talk at 5 p.m. CET or the recording afterwards via this link:

Quantum Science Seminar #37 - Edvardas Narevicius

Here you can find the recording of the last lecture by Fabio Sciarrino about "The quest of quantum advantage with a photonics platform"

Quantum Science Seminar #36 - Fabio Sciarrino

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