Heidelberg 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.8: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Coherent Matter Wave Dynamics of BECs for Atom Interferometry and ATOMTRONICS Quantum Devices — •Felix Schmaltz, Johannes Küber, Dominik Lohrey, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt

We discuss our approach to establish a novel platform for the application of BEC-based coherent matter waves in toroidal guiding geometries for ATOMTRONICS devices (such as atomic SQUIDS), atom interferometry, and quantum simulation.

Our architecture is based on a novel type of toroidal dipole-force potential generated by conical refraction providing a pair of concentric annular intensity distributions. Depending on detuning, these serve as a concentric pair of red-detuned potential minima or as a single blue-detuned potential minimum. By changing the parameters of the refractive crystal and the impinging laser beam, the potential parameters, such as ring diameter and well dimensions can be varied with high flexibility. We coherently load and accelerate or split a BEC with Bragg diffraction in the confining potential.

For optimized manipulation of the BEC wavefunction, we implemented the recently proposed technique of 'Double Bragg Diffraction' as a robust and highly efficient beam splitter for coherent matter waves.