# Ultra-high vacuum pressure measurement using cold atoms

## TL;DR

This paper presents a method to measure ultra-high vacuum pressure by analyzing collisional loss rates in a rubidium atom magneto-optical trap, offering a potential new standard for UHV pressure measurement.

## Contribution

It introduces a novel approach to determine UHV pressure using cold atom loss rates, enhancing measurement accuracy and standardization.

## Key findings

- Measured background pressure via MOT loss rates
- Estimated non-Rb gas contributions to losses
- Potential for cold-atom based UHV pressure standards

## Abstract

In this work, we have measured the background pressure in an ultra-high vacuum (UHV) chamber by measuring the collisional loss rates in a Rb atom magneto-optical trap (MOT) on an atom chip. The loss rate due to non-Rb gases in the background has been estimated by measuring the MOT loss rate in low Rb pressure regime. These results can be useful for development of cold-atoms based UHV pressure standards.