The EPR correlation in Kerr-Newman spacetime

TL;DR

This paper investigates how EPR correlations behave near a Kerr-Newman black hole, showing that optimal measurement adjustments can preserve entanglement up to the horizon, even for free-fall observers.

Contribution

It demonstrates that EPR entanglement can be maintained up to the black hole horizon by adjusting measurement directions, extending understanding of quantum correlations in curved spacetime.

Findings

EPR correlations are preserved up to the outer horizon with measurement adjustments.

Entanglement can be exploited even for freely falling observers near the black hole.

Full entanglement is recoverable up to the event horizon in Kerr-Newman spacetime.

Abstract

The EPR correlation has become an integral part of quantum communications as has general relativity in classical communication theory, however when combined an apparent deterioration is observed for spin states. We consider appropriate changes in directions of measurement to exploit full EPR entanglement for a pair of particles and show that it can be deduced only up to the outer even horizon of a Kerr-Newman black hole, even in the case of freely falling observer.