Entanglement Entropy in Closed String Theory

Understand

In local quantum field theory, the entanglement entropy of a region is divergent due to the arbitrary short-wavelength correlations near the boundary of the region.

• Quantum gravitational fluctuations are expected to cut off the entropy of the ultraviolet modes.
• Guided by this, we study the entanglement entropy in closed string theory.
• We factorize the configuration space of closed strings based on the position of the center of mass.