2026-06-08T02:38:26Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/515842024-09-03T15:12:40Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Hur, G.
author
Creffield, Charles
author
Jones, P.H.
author
Monteiro, T. S.
2023-06-20T11:00:19Z
2023-06-20T11:00:19Z
2005-07
1050-2947
10.1103/PhysRevA.72.013403
https://hdl.handle.net/20.500.14352/51584
http://dx.doi.org/10.1103/PhysRevA.72.013403
http://journals.aps.org
Recently, cesium atoms in optical lattices subjected to cycles of unequally spaced pulses have been found to show interesting behavior: they represent an experimental demonstration of a Hamiltonian ratchet mechanism, and they show strong variability of the dynamical localization lengths as a function of initial momentum. The behavior differs qualitatively from corresponding atomic systems pulsed with equal periods, which are a textbook implementation of a well-studied quantum chaos paradigm, the quantum δ-kicked rotor (δ- QKR). We investigate here the properties of the corresponding eigenstates (Floquet states) in the parameter regime of the recent experiments and compare them with those of the eigenstates of the δ-QKR at similar kicking strengths. We show that by studying the properties of the Floquet states we can shed light on the form of the observed ratchet current, as well as variations in the dynamical localization length.
eng
Chaotic quantum ratchets and filters with cold atoms in optical lattices: analysis using Floquet states
journal article
URL
https://docta.ucm.es/bitstreams/71cfb905-bcb6-4ef0-9b7d-1e72601ce8c6/download
File
MD5
1a85cd6e5c8c58d0471fe9b1b397e9dd
268005
application/pdf
Creffield C 18 LIBRE.pdf