An Etude on Global Vacuum Energy Sequester

Abstract

Recently two of the authors proposed a mechanism of vacuum energy sequester as a means of protecting the observable cosmological constant from quantum radiative corrections. The original proposal was based on using global Lagrange multipliers, but later a local formulation was provided. Subsequently other interesting claims of a different non-local approach to the cosmological constant problem were made, based again on global Lagrange multipliers. We examine some of these proposals and find their mutual relationship. We explain that the proposals which do not treat the cosmological constant counterterm as a dynamical variable require fine tunings to have acceptable solutions. Furthermore, the counterterm often needs to be retuned at every order in the loop expansion to cancel the radiative corrections to the cosmological constant, just like in standard GR. These observations are an important reminder of just how the proposal of vacuum energy sequester avoids such problems.

18 pages LaTeX

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Cited by in corpus (14)

• Gravitational Mechanisms to Self-Tune the Cosmological Constant: Obstructions and Ways Forward
• Hidden Variables of Gravity and Geometry and the Cosmological Constant Problem
• Monodromy inflation and an emergent mechanism for stabilising the cosmological constant
• Irrational Monodromies of Vacuum Energy
• Cosmological consequences of Omnia Sequestra
• Quantum corrections to vacuum energy sequestering (with monodromy)
• The Super-Stuckelberg procedure and dS in Pure Supergravity
• Generalised scalar-tensor theories and self-tuning
• Weinberg's No Go Theorem in Quantum Gravity
• A natural theory of dark energy
• More on Weinberg's No Go Theorem in Quantum Gravity
• CMB constraints on monodromy inflation at strong coupling
• Cosmic Acceleration in the Nonlocal Approach to the Cosmological Constant Problem
• On the Constraint Structure of Vacuum Energy Sequestering