Coherent Delocalization of Atomic Wave Packets in Driven Lattice Potentials

2008/01/10 by V. V. Ivanov, Andrea Alberti, A. Alberti +6 · 8 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Delocalized electron #Fourier transform #Lattice (music) #Optical lattice #Physics #Quantum mechanics #Quantum optics and atomic interactions #Wave packet #physics.atom-ph #physics.optics

paper · pdf · doi:10.1103/physrevlett.100.043602

4 pages

arxiv created 2008/01/10 · openalex publication_date 2008/01/31 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Theoretical analysis of quantum dynamics in one-dimensional lattices: Wannier-Stark description
• Quantum-state engineering with Josephson-junction devices
• Ballistic and Localized Transport for the Atom Optics Kicked Rotor in the Limit of a Vanishing Kicking Period
• Exploring the Phase Space of the Quantumδ-Kicked Accelerator
• Wannier-Stark resonances in optical and semiconductor superlattices

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