title: Accurate effective Hamiltonians via unitary flow in Floquet space.
abstract: We present a systematic construction of effective Hamiltonians of periodically driven quantum systems. Because of an equivalence between the time dependence of a Hamiltonian and an interaction in its Floquet operator, flow equations, that permit us to decouple interacting quantum systems, allow us to identify time-independent Hamiltonians for driven systems. With this approach, we explain the experimentally observed deviation of expected suppression of tunneling in ultracold atoms.
authors.affiliation: Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität, Albertstrasse 19, 79104 Freiburg, Germany.
authors.forename: Albert
authors.initials: A
authors.lastname: Verdeny
authors.forename: Andreas
authors.initials: A
authors.lastname: Mielke
authors.forename: Florian
authors.initials: F
authors.lastname: Mintert