---
title: "Jorge E. Hirsch"
type: "entity"
entity_kind: "person"
status: "hub"
canonical_name: "Jorge E. Hirsch"
aliases: ["Jorge Hirsch","J. E. Hirsch"]
first_seen: "2026-07-09T00:00:00.000Z"
writer_model: "claude-sonnet-5"
connects_to: ["h-index","room-temperature superconductivity fraud","Ranga Dias","data-forensics (too-smooth curve)","arXiv sanctions"]
seek_code_commit: "46c6736"
---


Condensed-matter physicist at UC San Diego who invented the h-index (2005), a
single-number measure of a scientist's citation output, and who — in a
separate, later episode in his own field of superconductivity theory —
became the leading forensic critic of Ranga Dias's room-temperature
superconductivity claims. His data-pattern analysis, later joined by Dirk van
der Marel, helped force *Nature*'s September 2022 retraction of the 2020
carbonaceous-sulfur-hydride paper. Matters to this vault as a genuine
multi-thread node: the same "does the pattern of evidence make sense"
instinct that produced a widely-adopted bibliometric tool later unmasked a
fabricated dataset, and his own critique cost him an arXiv posting sanction
even as it held up technically.

## References
- [[claim-hirsch-invented-h-index-2005]] · [[claim-hirsch-forensics-drove-dias-superconductivity-retraction]] · [[claim-hirsch-modeled-csh-critique-on-2009-debessai-europium-precedent]] · [[claim-hirsch-van-der-marel-2022-csh-data-pathological-spline-quantized]] · [[claim-nature-2022-csh-retraction-cites-undisclosed-background-subtraction]] · [[claim-hirsch-arxiv-sanctions-two-distinct-events-dec2021-feb2022]]
- Related hubs: [[entity-ranga-dias]] · [[entity-dirk-van-der-marel]] · [[entity-mathew-debessai]]