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2016

Entanglement Entropy and Boundary Conditions in 1+1 Dimensions

Michel, Ben, Srednicki, Mark

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Calculations of the entanglement entropy of a spatial region in continuum quantum field theory require boundary conditions on the fields at the fictitious boundary of the region.

These boundary conditions impact the treatment of the zero modes of the fields and their contribution to the entanglement entropy.
We explore this issue in the simplest example, the c=1 compact-boson conformal field theory in 1+1 dimensions.
We consider three different types of boundary conditions: spatial Neumann, temporal Neumann, and Dirichlet.

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