Quench action and Renyi entropies in integrable systems

  title={Quench action and Renyi entropies in integrable systems},
  author={Vincenzo Alba and Pasquale Calabrese},
Entropy is a fundamental concept in equilibrium statistical mechanics, yet its origin in the non-equilibrium dynamics of isolated quantum systems is not fully understood. A strong consensus is emerging around the idea that the stationary thermodynamic entropy is the von Neumann entanglement entropy of a large subsystem embedded in an infinite system. Also motivated by cold-atom experiments, here we consider the generalisation to Renyi entropies. We develop a new technique to calculate the… CONTINUE READING

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