Clock Fields and Logarithmic Decay of Dark Energy

TL;DR

This paper examines the infrared instability of de Sitter space and finds that its logarithmic decay of dark energy is only observable when an extra clock field is introduced, highlighting the importance of measurement frameworks.

Contribution

It demonstrates that the measurable decay of dark energy in de Sitter space requires an additional clock field, clarifying the conditions for observing infrared instability effects.

Findings

Logarithmic decay of the effective cosmological constant is only measurable with an added clock field.

Infrared instability effects depend on the measurement setup involving a clock field.

The formalism by Kitamoto et al. is analyzed in the context of physical measurability.

Abstract

We investigate the physical measurability of the infrared instability of a de Sitter phase in the formalism recently proposed by Kitamoto et al.. We find that the logarithmic decay of the effective cosmological constant is only measurable if an additional clock field is introduced.