Wigner Function and Entanglement Entropy for Bosons from Non-Equilibrium Field Theory

24 Oct 2018 Chakraborty Ahana Sensarma Rajdeep

We propose a new method of calculating entanglement entropy of a many-body interacting Bosonic system (open or closed) in a field theoretic approach without replica methods. The Wigner function and Renyi entropy of a Bosonic system undergoing arbitrary non-equilibrium dynamics can be obtained from its Wigner characteristic function, which we identify with the Schwinger Keldysh partition function in presence of quantum sources turned on at the time of measurement... (read more)

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Categories


  • STATISTICAL MECHANICS
  • QUANTUM GASES
  • QUANTUM PHYSICS