Snowmass 2021 White Paper: The Windchime Project

Understand

The absence of clear signals from particle dark matter in direct detection experiments motivates new approaches in disparate regions of viable parameter space.

• In this Snowmass white paper, we outline the Windchime project, a program to build a large array of quantum-enhanced mechanical sensors.
• The ultimate aim is to build a detector capable of searching for Planck mass-scale dark matter purely through its gravitational coupling to ordinary matter.
• In the shorter term, we aim to search for a number of other physics targets, especially some ultralight dark matter candidates.