On the Breakdown of Global Information Measures in Cosmology

Key Points

• The paper investigates how global information measures fail in cosmological contexts, particularly near horizons and boundaries.
• Examined global definitions of information and entropy in cosmological systems.
• Analyzed effects of causal structure and horizon formation on information measures.
• Investigated boundary constraints and their impact on global information definitions.
• Global information and entropy measures may not be well-defined across entire cosmological spacetimes.
• Causal structures and horizon formation limit globally consistent definitions of information.
• Local formulations of information may provide a better understanding in cosmology.

Abstract