# Dresden 2011 – wissenschaftliches Programm

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# Q: Fachverband Quantenoptik und Photonik

## Q 32: Quantum Information: Atoms and Ions 3

### Q 32.4: Vortrag

### Mittwoch, 16. März 2011, 15:15–15:30, HÜL 386

**Optical Ion Trapping - Cooling and Perspectives** — •Martin Enderlein, Thomas Huber, Christian Schneider, Stephan Duewel, Johannes Stroehle, and Tobias Schaetz — Max-Planck-Institut für Quantenoptik, Garching, Germany

Atomic ions stored in a linear Paul trap is one of the experimental quantum systems which is best controllable and suffers least from decoherence, making it particularly suited for quantum information experiments. Recently we were able to demonstrate a proof of principle for a quantum simulator for quantum spin systems by making use of the long-range interaction between ions [1]. The motivation for a quantum simulator is to gain deeper insight into complex quantum dynamics (e.g. of a solid-state system) via experimentally simulating the quantum behaviour of interest in another, better controllable quantum system (e.g. trapped ions). In order to gain genuinely new insights one has to scale these simulations to particle numbers that cannot be handled efficiently on a classical computer. This, however, might not be possible in a linear trap. One approach is to combine the advantages of trapped ions with those of optical lattices. As a first experimental step, we were able to trap an ion in a deep optical dipole trap [2]. In the mean time we have been analyzing the system in more detail and have investigated several laser cooling schemes. These results are the basis for future experiments with the goal of 2D quantum simulations with ions, or ions and atoms, trapped in optical lattices.

[1] A. Friedenauer et al., Nat. Phys. 4 (2008), 757-761

[2] Ch. Schneider et al., Nat. Photonics 4 (2010), 772-775