# Physicists trap antimatter particle for months

- Topic: science
- Source: [Wired](https://www.wired.com/story/scientists-trapped-an-antimatter-particle-for-months-to-study-its-secrets/)
- Published: 2026-10-25
- Original: https://www.wired.com/story/scientists-trapped-an-antimatter-particle-for-months-to-study-its-secrets/
- Language: en
- Image: https://media.wired.com/photos/6adaaa0519e924cf3288639a/master/pass/1344013114

## At a glance

- Northwestern University researchers successfully held a single positron in a vacuum for several months.
- The team used a quantum cyclotron to cool the antimatter particle to near absolute zero.
- This new technique allows for measurements that are 30 times more precise than previous methods.
- The study seeks to discover if subtle differences between matter and antimatter explain the universe's composition.

## Sources

- [Wired](https://www.wired.com/story/scientists-trapped-an-antimatter-particle-for-months-to-study-its-secrets/)

## The story

Physicists at Northwestern University have successfully trapped a single positron, the antimatter counterpart to an electron, for several months. Led by Gerald Gabrielse, the team utilized a specialized device called a single-positron quantum cyclotron to achieve this feat. By using precise electric and magnetic fields within a vacuum, the researchers were able to cool the particle to temperatures near absolute zero.

This extreme cooling allows scientists to control the particle's quantum states without physical contact or accidental annihilation. Previously, studying antimatter was hindered by the fact that contact with ordinary matter causes immediate energy release. This new method enables repeated measurements of a single particle, providing a stable environment for long-term observation.

The breakthrough aims to investigate whether subtle differences exist between matter and antimatter, which could explain why the observable universe is composed almost entirely of matter. The American Physical Society suggests this technology could make antimatter measurements 30 times more precise than previous methods. While initial results show no unexpected deviations, the increased precision may eventually force a revision of fundamental physical laws.

> Summary by Daily Read Bytes. [Read the original source](https://www.wired.com/story/scientists-trapped-an-antimatter-particle-for-months-to-study-its-secrets/)