Unitary Solution to a Quantum Gravity Information Paradox
Quantum Physics
2008-11-26 v1 General Relativity and Quantum Cosmology
Abstract
We consider a toy model of the interaction of a qubit with an exotic space-time containing a time-like curve. Consistency seems to require that the global evolution of the qubit be non-unitary. Given that quantum mechanics is globally unitary, this then is an example of a quantum gravity information paradox. However, we show that a careful analysis of the problem in the Heisenberg picture reveals an underlying unitarity, thus resolving the paradox.
Cite
@article{arxiv.0708.0449,
title = {Unitary Solution to a Quantum Gravity Information Paradox},
author = {T. C. Ralph},
journal= {arXiv preprint arXiv:0708.0449},
year = {2008}
}
Comments
5 pages