# Stuttgart 2012 – wissenschaftliches Programm

## Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

# Q: Fachverband Quantenoptik und Photonik

## Q 71: Ultra-cold plasmas and Rydberg systems

### Q 71.2: Vortrag

### Freitag, 16. März 2012, 14:15–14:30, V57.03

**Realization of Newton's cradle with interaction-blockaded atom clouds** — Sebastian Möbius^{1}, •Michael Genkin^{1}, Sebastian Wüster^{1}, Alexander Eisfeld^{1,2}, and Jan Michael Rost^{1} — ^{1}Max-Planck-Institut für Physik komplexer Systeme, 01187 Dresden, Germany — ^{2}Harvard University, Cambridge, MA 02138, USA

The remarkable properties of Rydberg atoms, such as long lifetimes, large polarizability and strong long-range interactions, make them a promising medium for quantum transport. As recently proposed [1], beyond classical (energy, momentum) also purely quantum mechanical (coherence, entanglement) properties can be adiabatically transported along a flexible chain of Rydberg atoms, reminiscent of Newton's cradle. However, an experimental realization of such a single atom chain is quite challenging. Here, we extend the scheme to a chain of Rydberg-blockaded atom clouds and study their dynamics induced by resonant dipole-dipole interactions. We first consider frozen nuclei, where dephasing due to static disorder is observed. Subsequently, we include atomic motion in the framework of a quantum-classical hybrid method. It is found that in such a setup only one atom from each trap would effectively participate in the transfer dynamics, and the bulk clouds remain stationary. We conclude that blockaded atom clouds facilitate an experimental realization of the Newton's cradle type of entanglement transport, since they overcome the need for single atoms.

[1] S. Wüster, C. Ates, A. Eisfeld and J.M. Rost, Phys. Rev. Lett. 105, 053004 (2010)