@article{2008-ivanov-tino-phys-rev-lett-v100-p043602,
	Abstract = {<p>
	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.</p>},
	Author = {Ivanov, V. V. AND Alberti, A. AND Schioppo, M. AND Ferrari, G. AND Artoni, M. AND Chiofalo, M. L. AND Tino, G. M.},
	Journal = {Phys. Rev. Lett.},
	Pages = {043602},
	Title = {{Coherent Delocalization of Atomic Wave Packets in Driven Lattice Potentials}},
	Volume = {100},
	Year = {2008}
}