Quantum Mechanics and Black Holes: Entanglement and Information

Recent studies have explored the relationship between quantum entanglement and black holes, focusing on the implications for information theory. Research published on ArXiv investigates maximally entangled states in the context of a dilaton black hole background, revealing that non-maximally entangled states can provide operational advantages for quantum information processing under gravitational effects, contradicting the common belief that maximally entangled states are always superior.

Another study examines a new bumblebee black hole and its effects on quantum information and thermodynamic properties, analyzing the degradation of quantum entanglement for field modes shared by inertial and accelerated observers, confirming the equivalence principle in Lorentz-violating vacua.

Additionally, research on the quantum stress tensor fluctuations emphasizes the limits of semiclassical gravity, noting that the fluctuations must remain small compared to their expectation value. This work suggests that squeezed vacua, which arise in black hole evaporation, do not satisfy the semiclassicality criterion, thereby challenging existing theories.

These findings contribute significantly to our understanding of quantum mechanics and black hole physics, particularly regarding the fundamental nature of reality.