de Sitter Space Decay and Cosmological Constant Relaxation in Unimodular Gravity with Charged Membranes
arXiv:2305.02349 · doi:10.1103/PhysRevD.108.025005
Abstract
General covariant unimodular gravity frameworks, based on the Henneaux-Teitelboim formulation, are, in disguise, precisely -form field theories corrected with higher dimension operators. In the presence of charged tensional membranes, any de Sitter space in all such theories is unstable and decays. If the fluxes sourced by membranes are mutually incommensurate, de Sitter geometries comprise a very refined discretuum of states. Whenever the -form sector is dominated by terms linear in flux the almost-Minkowski space is the unique long-time attractor. As a result, a tiny cosmological constant is natural in all such frameworks, without appealing to anthropic reasoning.
28 pages, 5 figures; v2: Final version as published in PRD: title changed in journal, added discussion, added labels in a figure, extra references
References in corpus (12)
- Generalized Global Symmetries
- Symmetries and Strings in Field Theory and Gravity
- A Natural Framework for Chaotic Inflation
- An Ignoble Approach to Large Field Inflation
- Self-tuning vacuum variable and cosmological constant
- Towards observable signatures of other bubble universes
- Where in the String Landscape is Quintessence
- Vacuum Energy Sequestering: The Framework and Its Cosmological Consequences
- Can quantum fluctuations differentiate between standard and unimodular gravity?
- A Quantum-Mechanical Mechanism for Reducing the Cosmological Constant
- Hidden Variables of Gravity and Geometry and the Cosmological Constant Problem
- BRST Quantization of General Relativity in Unimodular Gauge and Unimodular Gravity