Dynamically generated double occupancy as a probe of cold atom systems.
The experimental investigation of quantum phases in optical lattice systems provides major challenges. Recently, dynamical generation of double occupancy via modulation of the hopping amplitude t has been used to characterize the strongly correlated phase of fermionic atoms. Here, we want to validate this experimental technique with a theoretical study of the driven Hubbard model using analytic methods. We find that conclusive evidence for a Mott phase can be inferred from such a measurement, provided that sufficiently low temperatures k_{B}T<<t can be reached.
Huber
S D
SD
Theoretische Physik, ETH Zurich, CH-8093 Zürich, Switzerland.
Rüegg
A
A