Controlled wave-packet manipulation with driven optical lattices

Details Controlled wave-packet manipulation with driven optical lattices Controlled wave-packet manipulation with driven optical lattices

2011-12-14

arxiv.org/abs/1112.3272v1

Phys. Rev. A 84, 063617 (2011)

Physics

Condensed Matter

Quantum Gases

11 pages, 10 figures

Scientific paper

10.1103/PhysRevA.84.063617

Motivated by recent experimental progress achieved with ultracold atoms in kilohertz-driven optical lattices, we provide a theoretical discussion of mechanisms governing the response of a particle in a cosine lattice potential to strong forcing pulses with smooth envelope. Such pulses effectuate adiabatic motion of a wave packet's momentum distribution on quasienergy surfaces created by spatiotemporal Bloch waves. Deviations from adiabaticity can then deliberately be exploited for exerting coherent control and for reaching target states which may not be accessible by other means. As one particular example, we consider an analog of the \pi-pulses known from optical resonance. We also suggest adapting further techniques previously developed for controlling atomic and molecular dynamics by laser pulses to the coherent control of matter waves in shaken optical lattices.

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