Atomic wave packets loaded into a phase-modulated vertical optical-lattice potential exhibit a coherent delocalization dynamics arising from intraband transitions among Wannier-Stark levels. Wannier-Stark intraband transitions are here observed by monitoring the in situ wave-packet extent. By varying the modulation frequency, we find resonances at integer multiples of the Bloch frequency. The resonances show a Fourier-limited width for interrogation times up to 2 s. This can also be used to determine the gravity acceleration with ppm resolution.
Autori interni: | |
Autori: | Ivanov, Vv; Alberti, A; Schioppo, M; Ferrari, G; Artoni, M; Chiofalo, MARIA LUISA; Tino, Gm |
Titolo: | Coherent delocalization of atomic wave packets in driven lattice potentials |
Anno del prodotto: | 2008 |
Digital Object Identifier (DOI): | 10.1103/PhysRevLett.100.043602 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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