Self-similar scaling in the coherent dynamics of ultracold atoms

Year: 2009

Authors: Artoni M., La Rocca G., Ferrari G.

Autors Affiliation: Department of Chemistry and Physics of Materials, University of Brescia and CNR–INFM, Brescia 25123, Italy; LENS–Polo Scientifico, Sesto Fiorentino 50019, Italy; Scuola Normale Superiore and CNISM, Pisa 56126, Italy; INO-CNR, Sesto Fiorentino 50019, Italy

Abstract: Well-resolved and long-lived atomic Bloch oscillations provide straightforward access to intriguing yet fascinating self-similar patterns. These could be observed in the quasienergy spectra of ultracold atomic wave packets subject to gravity in a driven optical lattice potential. As for the Hofstadter butterflylike energy spectra of crystal electrons in a uniform magnetic field, these atomic quasienergy spectra are shown to originate from commensurability between the Bloch oscillations period and the lattice driving period.

Journal/Review: PHYSICAL REVIEW A

Volume: 80 (2)      Pages from: 021604  to: 021604

More Information: Fruitful discussions with F. Bassani, R. Sapienza, A. Alberti, M. Inguscio, and M. Chiofalo are gratefully acknowledged as well as financial support from the MIUR (Prin 2006-021037 and Italy-Spain Azione Integrata IT09L244H5) as well as the 2008-09 CRUI-British Council Partnership Program.
DOI: 10.1103/PhysRevA.80.021604

Citations: 4
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