Observation of Collisions between Two Ultracold Ground-State CaF Molecules

Observation of Collisions between Two Ultracold Ground-State CaF Molecules

We measure inelastic collisions between ultracold CaF molecules by combining two optical tweezers, each containing a single molecule. We observe collisions between 2Σ CaF molecules in the absolute ground state | X, v = 0, N = 0, F = 0 ⟩ , and in excited hyperfine and rotational states. In the absolu...

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Veröffentlicht in:Physical review letters 2020-07, Vol.125 (4), p.1-043401, Article 043401
Hauptverfasser: Cheuk, Lawrence W., Anderegg, Loïc, Bao, Yicheng, Burchesky, Sean, Yu, Scarlett S., Ketterle, Wolfgang, Ni, Kang-Kuen, Doyle, John M.
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Ground state
Inelastic collisions
Rotational states
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container_end_page 043401
container_issue 4
container_start_page 1
container_title Physical review letters
container_volume 125
creator Cheuk, Lawrence W.
Anderegg, Loïc
Bao, Yicheng
Burchesky, Sean
Yu, Scarlett S.
Ketterle, Wolfgang
Ni, Kang-Kuen
Doyle, John M.
description We measure inelastic collisions between ultracold CaF molecules by combining two optical tweezers, each containing a single molecule. We observe collisions between 2Σ CaF molecules in the absolute ground state | X, v = 0, N = 0, F = 0 ⟩ , and in excited hyperfine and rotational states. In the absolute ground state, we find a two-body loss rate of 7 ( 4 ) × 10−11     cm3 /s, which is below, but close to, the predicted universal loss rate.
doi_str_mv 10.1103/PhysRevLett.125.043401
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subjects Ground state
Inelastic collisions
Rotational states
title Observation of Collisions between Two Ultracold Ground-State CaF Molecules
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