Thermal Shadows of the Vacuum: Entanglement Signatures Across Time-Dependent Event Horizons

Abstract

This paper investigates the interplay of quantum entanglement and thermal characteristics of the vacuum fluctuations in terms of time-dependent event horizons. These event horizons, present in dynamic black holes or accelerating spacetimes, provide a special view of how the dynamics of entanglement can affect the thermal properties of quantum fields. Using quantum field theory on curved spacetime and studying the thermodynamics of event horizons, a framework is introduced that relates the time dependence of the horizon with observable thermal signatures that are related to quantum entanglement. It is suggested that correlations due to entanglement can produce a characteristic set of so-called thermal shadows in the emitted radiation. These predictions can be confirmed by future experimental systems, and more importantly, the new possibilities of quantum gravitational studies may be opened by the advanced astrophysics observations.