Generalized Rindler Wedge and Holographic Observer Concordance

Understand

Defining gravitational subsystems has long been challenging due to the lack of the conventional notion of locality in gravity.

• In this work, we define gravitational subsystems from the observable spacetime subregions of a set of well-defined accelerating observers.
• We study the most general horizons of accelerating observers and find that in a general spacetime, only spacelike surfaces satisfying a global condition could become horizons of well-defined accelerating observers, which we name the Rindler-convexity condition.
• The entanglement entropy associated with a Rindler-convex region is proportional to the area of the enclosing surface.