# How to Hide a Cosmological Constant

## TL;DR

This paper explores the possibility that a large cosmological constant could be concealed within Planck-scale spacetime foam, potentially explaining its apparent smallness in the universe.

## Contribution

It proposes a novel idea that spacetime foam could hide a large cosmological constant, offering a new perspective on the cosmological constant problem.

## Key findings

- Spacetime foam may conceal large vacuum energy effects
- Planck-scale fluctuations could hide the cosmological constant
- Macroscopic invisibility of a large cosmological constant

## Abstract

Naive calculations in quantum field theory suggest that vacuum fluctuations should induce an enormous cosmological constant. What if these estimates are right? I argue that even a huge cosmological constant might be hidden in Planck scale fluctuations of geometry and topology---what Wheeler called `spacetime foam'---while remaining virtually invisible macroscopically.