Semiclassical solution of black hole information paradox

TL;DR

This paper presents a semiclassical gravity approach that resolves the black hole information paradox by showing that Hawking radiation is entangled with near-horizon degrees of freedom, preserving information without relying on unknown quantum gravity details.

Contribution

It introduces a novel semiclassical framework where Hawking radiation's entanglement with near-horizon states resolves the paradox without quantum gravity assumptions.

Findings

Hawking particles are created far from the horizon and entangled with near-horizon states.

Hawking radiation is accompanied by classical-like radiation, preserving information.

The entanglement between different radiation types resolves the information paradox.

Abstract

We resolve black hole information paradox within semiclassical gravity, in a manner that does not depend on details of unknown quantum gravity. Our crucial insight is that outgoing Hawking particles are physical only far from the black hole horizon, so they are created far from the horizon and entangled with degrees of freedom closer to the horizon. The latter degrees of freedom can be understood as quasi-classical coherent states, implying that Hawking radiation is accompanied with additional radiation similar to classical radiation by which the black hole loses hair during the classical gravitational collapse. The two kinds of radiation are entangled, which resolves black hole information paradox.