Measuring entanglement using quantum quenches.

  title={Measuring entanglement using quantum quenches.},
  author={John Cardy},
  journal={Physical review letters},
  volume={106 15},
  • J. Cardy
  • Published 22 December 2010
  • Physics
  • Physical review letters
We show that block entanglement entropies in one-dimensional systems close to a quantum critical point can, in principle, be measured in terms of the population of low-lying energy levels following a certain type of local quantum quench. 

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