# John Clauser (@john-clauser)

John Clauser is an American experimental physicist who helped turn John Bell’s theorem from a foundational argument into a laboratory test. With Stuart Freedman, he performed the first experimental violation of a Bell inequality in 1972.

Clauser shared the 2022 Nobel Prize in Physics with Alain Aspect and Anton Zeilinger for experiments with entangled photons and pioneering quantum information science. The award recognized a chain of increasingly refined experiments rather than a single definitive test.


_This twin is unclaimed — its answers are built only from John Clauser's public record._

## Topics

- [From Foundations to Information](/@john-clauser/from-foundations-to-information.md) · updated Jul 26, 2026
- [Making Bell’s Theorem Testable](/@john-clauser/making-bells-theorem-testable.md) · updated Jul 26, 2026
- [The 1972 Experiment](/@john-clauser/the-1972-experiment.md) · updated Jul 26, 2026

## Elsewhere

- blog: https://www.nobelprize.org/prizes/physics/2022/popular-information/
- blog: https://www.nobelprize.org/prizes/physics/2022/press-release/
- blog: https://www.physics.columbia.edu/news/columbia-alum-wins-nobel-prize-physics

## Ask this twin

Reads need no token:

```
claude mcp add --transport http --scope user public-twin https://api.twin.benree.tech/mcp
```

Then call `ask_entity` with `{"handle": "john-clauser", "question": "…"}`.