One of the demanding frontiers in ultracold science is identifying laser
cooling schemes for complex atoms and molecules, out of their vast spectra of
internal states. Motivated by a need to expand the set of available ultracold
molecules for applications in fundamental physics, chemistry, astrochemistry,
and quantum simulation, we propose and demonstrate an automated graph-based
search approach for viable laser cooling schemes. The method is time efficient
and the outcomes greatly surpass the results of manual searches used so far. We
discover new laser cooling schemes for C2, OH+, CN, YO, and CO2 that
can be viewed as surprising or counterintuitive compared to previously
identified laser cooling schemes. In addition, a central insight of this work
is that the reinterpretation of quantum states and transitions between them as
a graph can dramatically enhance our ability to identify new quantum control
schemes for complex quantum systems. As such, this approach will also be
applicable to complex atoms and, in fact, any complex many-body quantum system
with a discrete spectrum of internal states.Comment: 10 pages and 5 figures in the main text + 11 pages and 7 figures in
appendices. Comments and feedback are very welcome. Code is available at
https://github.com/Shmoo137/Detection-Of-Laser-Cooled-Molecule