ac Stark shift and multiphoton-like resonances in low-frequency driven optical lattices

Abstract

We suggest that Bose-Einstein condensates in optical lattices subjected to ac forcing with a smooth envelope may provide detailed experimental access to multiphoton-like transitions between ac-Stark-shifted Bloch bands. Such transitions correspond to resonances described theoretically by avoided quasienergy crossings. We show that the width of such anticrossings can be inferred from measurements involving asymmetric pulses. We also introduce a pulse tracking strategy for locating the particular driving amplitudes for which resonances occur. Our numerical calculations refer to a currently existing experimental set-up [Haller et al., PRL 104, 200403 (2010)].

5 pages, 6 figures

References in corpus (6)

• Dynamical control of matter-wave tunneling in periodic potentials
• Coherent control of dressed matter waves
• Observation of photon-assisted tunneling in optical lattices
• Exploring dynamic localization with a Bose-Einstein condensate
• Generalized acceleration theorem for spatiotemporal Bloch waves
• Driven optical lattices as strong-field simulators