Coherent Delocalization of Atomic Wave Packets in Driven Lattice Potentials

V. V. Ivanov, A. Alberti, M. Schioppo, G. Ferrari, M. Artoni, M. L. Chiofalo, G. M. Tino
2008 Physical Review Letters  
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
more » ... rmine the gravity acceleration with ppm resolution.
doi:10.1103/physrevlett.100.043602 pmid:18352272 fatcat:ovxh3n3ssbchtppx3a4g5ekkgi