Hawking's information puzzle: a solution realized in loop quantum cosmology

Abstract

In approaches to quantum gravity, where smooth spacetime is an emergent approximation of a discrete Planckian fundamental structure, any standard effective field theoretical description will miss part of the degrees of freedom and thus break unitarity. Here we show that these expectations can be made precise in loop quantum cosmology. Concretely, even when loop quantum cosmology is unitary at the fundamental level, when microscopic degrees of freedom, irrelevant to low-energy cosmological observers, are suitably ignored, pure states in the effective description evolve into mixed states due to decoherence with the Planckian microscopic structure. When extrapolated to black hole formation and evaporation, this concrete example provides a key physical insight for a natural resolution of Hawking's information paradox.

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Cited by in corpus (5)

• Teleparallel Gravity: From Theory to Cosmology
• Quantum dynamics of the black hole interior in LQC
• Quantum Corrected Polymer Black Hole Thermodynamics: Mass Relations and Logarithmic Entropy Correction
• Searching for Coherent States: From Origins to Quantum Gravity
• Hidden Symmetries in Gravity : Black holes and other minisuperspaces