I am a Postdoctoral Research Fellow in physics at Harvard University in Cambridge, MA, USA. Before, I worked at the Max Planck Institute for Dynamics and Self-Organization and the University of Göttingen in Germany where I also got my PhD. Currently, I'm a Visiting Scholar at the University of Bremen, Germany.

Department of Physics, Harvard University
holgerh [at] physics.harvard.edu
[Jul 03, 2012] New article "Musical rhythms: The science of being slightly off" is on the cover of Physics Today
Complex systems:
- Complex networks
- Correlations in collective animal behavior (bird flocks)
- Rhythm of Speech

Dynamics of ultracold atoms in optical lattices
Entangled or not entangled: that is the question. Whether or not a Bose-Einstein condensate trapped in two optical wells remains coherent (or entangled) can be seen through a “Quantum Eye”.
More information here.