5th Institute of Physics
 
 
 
 

News From The Lab

Realizing a supersolid phase with a dipolar quantum gas is an outstanding goal in the community. In the present publication "Striped states in a many-body system of tilted dipoles" in Physical Review A we report on the progress towards the realization of such a state in our experiment and develop the framework to create and detect it.

We study theoretically and experimentally the behavior of a strongly confined dipolar Bose-Einstein condensate in the regime of quantum-mechanical stabilization by beyond-mean-field effects. Theoretically, we demonstrate that self-organized “striped” ground states are predicted in the framework of the extended Gross-Pitaevskii theory. Experimentally, by tilting the magnetic dipoles we show that self-organized striped states can be generated, likely in their metastable state. Matter-wave interference experiments with multiple stripes show that there is no long-range off-diagonal order (global phase coherence). We outline a parameter range where global phase coherence could be established, thus paving the way towards the observation of supersolid states in this system.

 

The full article can be found here:

"Striped states in a many-body system of tilted dipoles"
Physical Review A
96, 053630 (2017)  DOI

 

One of the striped states we observed in the experiment (1 pixel = 0.32 µm):

striped state

 

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