Fundamental spatiotemporal decoherence: a key to solving the conceptual problems of black holes, cosmology and quantum mechanics

TL;DR

This paper proposes that fundamental spatiotemporal decoherence, arising from relational measurements in gravity, could resolve key conceptual issues in black holes, cosmology, and quantum mechanics by addressing coherence loss.

Contribution

It introduces the idea that intrinsic decoherence due to relational measurements offers a novel solution to longstanding problems in quantum theory and gravity.

Findings

Relational measurements cause fundamental decoherence in quantum systems.

Decoherence may resolve the black hole information paradox.

Decoherence could explain the origin of cosmological inhomogeneities.

Abstract

Unitarity is a pillar of quantum theory. Nevertheless, it is also a source of several of its conceptual problems. We note that in a world where measurements are relational, as is the case in gravitation, quantum mechanics exhibits a fundamental level of loss of coherence. This can be the key to solving, among others, the puzzles posed by the black hole information paradox, the formation of inhomogeneities in cosmology and the measurement problem in quantum mechanics.