Correlation loss and multipartite entanglement across a black hole
horizon
(pp0657-0665)
Gerardo
Adesso and Ivette Fuentes-Schuller
doi:
https://doi.org/10.26421/QIC9.7-8-8
Abstracts:
We investigate the Hawking effect on entangled fields. By
considering a scalar field which is in a two-mode squeezed state from
the point of view of freely falling (Kruskal) observers crossing the
horizon of a Schwarzschild black hole, we study the degradation of
quantum and classical correlations in the state from the perspective of
Schwarzschild observers confined outside the horizon. Due to monogamy
constraints on the entanglement distribution, we show that the lost
bipartite entanglement is recovered as multipartite entanglement among
modes inside and outside the horizon. In the limit of a small-mass black
hole, no bipartite entanglement is detected outside the horizon, while
the genuine multipartite entanglement interlinking the inner and outer
regions grows infinitely.
Key words:
Multipartite entanglement, continuous variable
correlations, Hawking-Unruh effect, Schwarzschild black holes |