Islands and complexity of eternal black hole and radiation subsystems for a doubly holographic model

Understand

We study the entanglement islands and subsystem volume complexity corresponding to the left/ right entanglement of a conformal defect in $d$-dimensions in Randall-Sundrum (RS) braneworld model with subcritical tension brane.

• The left and right modes of the defect mimic the eternal black hole and radiation system respectively.
• Hence the entanglement entropy between the two follows an eternal black hole Page curve which is unitarity compatible.
• We compute the volumes corresponding to the left and right branes with preferred Ryu-Takanayagi (RT) surfaces at different times, which provide a probe of the subregion complexity of the black hole and the radiation states respectively.