Gravity in the dynamical approach to the cosmological constant

TL;DR

This paper explores a dynamical feedback mechanism that stabilizes the cosmological constant against radiative corrections, demonstrating its classical and quantum stability and potential to aid in solving the cosmological constant problem.

Contribution

It investigates the stability and gravitational implications of a feedback mechanism designed to protect a small or zero cosmological constant.

Findings

The feedback mechanism is classically stable.

The feedback mechanism is quantum mechanically stable.

The dynamics of the mechanism are self-consistent and stable.

Abstract

One of the most disturbing difficulties in thinking about the cosmological constant is that it is not stable under radiative corrections. The feedback mechanism proposed in [hep-th/0306108] is a dynamical way to protect a zero or small cosmological constant against radiative corrections. Hence, while this by itself does not solve the cosmological constant problem, it can help solving the problem. In the present paper we investigate stability and gravity in this approach and show that the feedback mechanism is both classically and quantum mechanically stable and has self-consistent, stable dynamics.