Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 32: Poster: Quantum gases, ultracold atoms and molecules

Q 32.3: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

Collision studies in ultra cold calcium atoms — •Hannes Winter and Andreas Hemmerich — Institut für Laserphysik, Universität Hamburg,

We present collision studies of metastable optically trapped calcium atoms and discuss the feasibility of achieving Bose-Einstein condensation in these states by evaporative cooling methods. The metastable states of alkaline earth and rare earth elements have novel elastic and inelastic scattering properties [1], with important implications for applications like time metrology and lattice-based quantum computing.

The atoms are prepared by an alternative method analogous to the one used to create a ground state BEC [2].

We also discuss our new setup to realize a superradiant laser [3] similar to the proposal by [4].

[1] V. Kokoouline et al., Phys. Rev. Lett. 90, 253201 (2003).

[2] P. Halder, C.-Y. Yang and A. Hemmerich, Phys. Rev. A 85, 031603 (2012).

[3] M. Holland and J. Thompson et al. Nature, 484(7392):78-81, (2012).

[4] M. Holland et al., Phys. Rev. Lett. 102(16):163601, (2009).

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