Author(s): Martin Reitter, Jakob Näger, Karen Wintersperger, Christoph Sträter, Immanuel Bloch, André Eckardt, and Ulrich Schneider
Experiments confirm that photon interactions cause heating of ultracold atoms in a periodically driven optical lattice. Driving at higher frequencies causes the highest-energy atoms to leave the trap, which cools the system.
[Phys. Rev. Lett. 119, 200402] Published Thu Nov 16, 2017