The evolution of expanding spacetime realizes approximate quantum cloning
General Relativity and Quantum Cosmology
2024-05-09 v1 High Energy Physics - Theory
Quantum Physics
Abstract
We investigate how quantum information, encoded in a quantum field, evolves during the expansion of spacetime. Due to information loss across the horizon, a local observer experiences this evolution as a nonunitary quantum channel. We obtain this channel in the case of de Sitter spacetime by assuming the initial global state encodes a signal state via fluctuations of the Bunch-Davies vacuum. Notably, de Sitter evolution exhibits intriguing cloning properties, establishing a connection between the curvature of spacetime and the propagation of quantum information.
Cite
@article{arxiv.2405.04965,
title = {The evolution of expanding spacetime realizes approximate quantum cloning},
author = {Laura Niermann and Tobias J. Osborne},
journal= {arXiv preprint arXiv:2405.04965},
year = {2024}
}