2021-01-282021-01-282017-07-192041-17232041-1723http://dx.doi.org/10.34944/dspace/510628722014 (pubmed)http://hdl.handle.net/20.500.12613/5124© The Author(s) 2017. A fundamental question in the study of chemical reactions is how reactions proceed at a collision energy close to absolute zero. This question is no longer hypothetical: quantum degenerate gases of atoms and molecules can now be created at temperatures lower than a few tens of nanokelvin. Here we consider the benchmark ultracold reaction between, the most-celebrated ultracold molecule, KRb and K. We map out an accurate ab initio ground-state potential energy surface of the K2Rb complex in full dimensionality and report numerically-exact quantum-mechanical reaction dynamics. The distribution of rotationally resolved rates is shown to be Poissonian. An analysis of the hyperspherical adiabatic potential curves explains this statistical character revealing a chaotic distribution for the short-range collision complex that plays a key role in governing the reaction outcome.15897-enCC BYhttp://creativecommons.org/licenses/by/4.0/0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics0306 Physical Chemistry (incl. Structural)0307 Theoretical and Computational ChemistryUniversality and chaoticity in ultracold K+KRb chemical reactionsArticle2021-01-28