Coherent Delocalization of Atomic Wave Packets in Driven Lattice Potentials

Details Coherent Delocalization of Atomic Wave Packets in Driven Lattice Potentials Coherent Delocalization of Atomic Wave Packets in Driven Lattice Potentials

2008-01-10

arxiv.org/abs/0801.1570v1

Physics

Atomic Physics

4 pages

Scientific paper

10.1103/PhysRevLett.100.043602

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.

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