Periodic Wannier-Stark ladder structures of the energy resonances associated with Bloch oscillations can be readily modified into quasi-periodic ones that exhibit peculiar self-similar effects. A compact theoretical description of the dynamics of driven Bloch oscillations is developed here within the quasi-momentum representation. We identify a rather viable scheme based on ultracold atomic wavepackets subject to gravity in a driven optical lattice potential where a self-similar scaling could be observed. Its feasibility in terms of realistic experimental parameters is also discussed.
|Titolo:||Quasi-periodic Wannier-Stark ladders from driven atomic Bloch oscillations|
|Data di pubblicazione:||2014|
|Parole Chiave:||atomic Bloch oscillations; self-similar structures; ultracold atoms|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1098/rspa.2014.0421|
|Appare nelle tipologie:||1.1 Articolo in rivista|