Detecting two-site spin-entanglement in many-body systems with local particle-number fluctuations

@article{Mazza2014DetectingTS,
  title={Detecting two-site spin-entanglement in many-body systems with local particle-number fluctuations},
  author={Leonardo Mazza and Davide Rossini and Rosario Fazio and M. Endres},
  journal={New Journal of Physics},
  year={2014},
  volume={17}
}
We derive experimentally measurable lower bounds for the two-site entanglement of the spin-degrees of freedom of many-body systems with local particle-number fluctuations. Our method aims at enabling the spatially resolved detection of spin-entanglement in Hubbard systems using high-resolution imaging in optical lattices. A possible application is the observation of entanglement generation and spreading during spin impurity dynamics, for which we provide numerical simulations. More generally… 
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