Thermometry of ultracold fermions by (super)lattice modulation spectroscopy

@article{Loida2015ThermometryOU,
  title={Thermometry of ultracold fermions by (super)lattice modulation spectroscopy},
  author={Karla Loida and Ameneh Sheikhan and Corinna Kollath},
  journal={Physical Review A},
  year={2015},
  volume={92},
  pages={043624}
}
We theoretically consider non-interacting fermions confined to optical lattices and apply a lattice amplitude modulation that we choose to be either homogeneous or of superlattice geometry. We study the atom excitation rate to higher Bloch bands which can be measured by adiabatic band mapping. We find that the atom excitation rate shows a clear signature of the temperature dependent Fermi distribution in the lowest band of the equilibrium lattice as excitations are quasimomentum-resolved. Based… 

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