Why The Cosmological Constant is a Boundary Condition

TL;DR

This paper discusses the perspective that the cosmological constant should be viewed as a boundary condition in quantum gravity models rather than a local energy density contribution.

Contribution

It presents a review arguing that the cosmological constant is better understood as an infrared boundary condition in quantum gravity frameworks.

Findings

Reframes the cosmological constant as a boundary condition

Highlights implications for quantum gravity models

Challenges traditional local energy density interpretation

Abstract

We review arguments that the cosmological constant (c.c.) should not be thought of as a local contribution to the energy density, but rather as an infrared boundary condition specifying particular models of quantum gravity.