The introduction of a relational time in quantum gravity naturally implies that pure quantum states evolve into mixed quantum states. We show, using a recently proposed concrete implementation, that the rate at which pure states naturally evolve into mixed ones is faster than that due to collapsing into a black hole that later evaporates. This is rather remarkable since the fundamental mechanism for decoherence is usually very weak. Therefore the "black hole information puzzle" is rendered de-facto unobservable. © World Scientific Publishing Company.
Publication Source (Journal or Book title)
International Journal of Modern Physics D
Gambini, R., Porto, R., & Pullin, J. (2004). No black hole information puzzle in a relational universe. International Journal of Modern Physics D, 13 (10), 2315-2320. https://doi.org/10.1142/S0218271804006383