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. © 2008 The American Physical Society.
Coherent delocalization of atomic wave packets in driven lattice potentials / Ivanov, V. V.; Alberti, A.; Schioppo, M.; Ferrari, G.; Artoni, M.; Chiofalo, M. L.; Tino, G. M.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 100:4(2008). [10.1103/PhysRevLett.100.043602]
Coherent delocalization of atomic wave packets in driven lattice potentials
Ferrari G.;
2008-01-01
Abstract
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. © 2008 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
