Abstract
Particles in a perfect lattice potential perform Bloch oscillations when subject to a constant force, leading to localization and preventing conductivity. For a weakly interacting Bose-Einstein condensate of Cs atoms, we observe giant center-of-mass oscillations in position space with a displacement across hundreds of lattice sites when we add a periodic modulation to the force near the Bloch frequency. We study the dependence of these "super" Bloch oscillations on lattice depth, modulation amplitude, and modulation frequency and show that they provide a means to induce linear transport in a dissipation-free lattice.
| Original language | English |
|---|---|
| Article number | 200403 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 104 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 21 May 2010 |
Keywords
- Bloch oscillations
- dissipation-free lattice
- Bloch frequency