Accurate effective Hamiltonians via unitary flow in Floquet space

Autor: Verdeny, Albert, Mielke, Andreas, Mintert, Florian
Rok vydání: 2013
Předmět:
Zdroj: Phys. Rev. Lett. 111, 175301 (2013)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevLett.111.175301
Popis: 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 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.
Databáze: arXiv