Tuesday, April 16, 2013

1304.3584 (Albert Verdeny Vilalta et al.)

Accurate effective Hamiltonians via unitary flow in Floquet space    [PDF]

Albert Verdeny Vilalta, Andreas Mielke, Florian Mintert
We present a systematic construction of effective Hamiltonians of periodically driven quantum systems. Due to 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 ultra-cold atoms.
View original: http://arxiv.org/abs/1304.3584

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