---
title: "John Clauser"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "John Clauser"
aliases: []
first_seen: "2026-10-24T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["Bell's theorem","CHSH inequality","Bell-test experiments","Abner Shimony","quantum foundations"]
seek_code_commit: "d40ee39"
---


American physicist, co-recipient of the 2022 Nobel Prize in Physics for experimental work demonstrating violations of Bell inequalities and pioneering quantum information science, and co-formulator (with Michael Horne, Abner Shimony, and Richard Holt) of the 1969 CHSH inequality. In the vault he appears, alongside [[entity-abner-shimony|Shimony]], as one of the two contemporaries named by Yu Shi's 2025 historical analysis as having identified the structural limitation of the Wu-Shaknov apparatus — that its two wings could only measure polarizations parallel or perpendicular to each other, never at the intermediate angles a Bell-inequality test requires — which is part of why the 1957 Bohm-Aharonov paper could not have anticipated Bell's 1964 result despite Aharonov's later priority claim.

## References
- [[claim-bohm-aharonov-1957-narrower-than-bell-wu-shaknov-angle-limit]]