AAPPS bulletin

December 2021Vol 31

Research and Review
  • On the renormalization of entanglement entropy

    Jin-Yi Pang & Jiunn-Wei Chen

    Abstract The renormalization of entanglement entropy of quantum field theories is investigated in the simplest setting with a λϕ4 scalar field theory. The 3+1 dimensional spacetime is separated into two regions by an infinitely flat 2-dimensional interface. The entanglement entropy of the system across the interface has an elegant geometrical interpretation using the replica trick, which requires putting the field theory on a curved spacetime background. We demonstrate that the theory, and henc

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