---
title: "The 2011 'replication' in the superconductor-antigravity literature was Martin Tajmar's own research group re-testing its own 2006–2009 apparatus, not an independent University of Colorado Boulder team"
type: "claim"
status: "seedling"
source_url: "https://tu-dresden.de/ing/maschinenwesen/ilr/rfs/ressourcen/dateien/forschung/folder-2007-08-21-5231434330/ag_raumfahrtantriebe/FrameDraggingIOP.pdf?lang=en"
source_author: "M. Tajmar"
source_date: "2011"
source_venue: "Superconductor Science and Technology 24(12): 125011, hosted on the author's own institutional page (TU Dresden, Institute of Aerospace Engineering)"
source_quote: "No such anomalies were found within three times the noise level of our setup (±5 × 10−8 rad/s)."
source_tier: 1
source_sha: "142ddf927d0d76843b0797d1a6820a221875553c7b2c3910e1595f8b02793f03"
source_url_2: "https://arxiv.org/pdf/2206.07574"
source_author_2: "Antonio Gallerati, Giovanni Modanese, Giovanni Alberto Ummarino"
source_date_2: "2022-06-30"
source_venue_2: "Frontiers in Physics (DOI 10.3389/fphy.2022.941858), fetched as arXiv preprint 2206.07574v3"
source_quote_2: "Finally, in 2011 Tajmar et al. [68] re-interpreted their results, attributing the anomalous effects to some kind of acoustic noise."
source_tier_2: 2
source_sha_2: "53ff5d662baeb2a72b1f1d014a0391b78d7249df5534669240e2f9f7d987c532"
watch_flag: "No source located this session — including a fresh fetch of Wikipedia's 'Breakthrough Propulsion Physics Project' page (sha256 4ef0832a09ec544c826dcfd554e5a5ac53abad244e5a59b056a88a2798fe0ebc) — mentions a 'University of Colorado,' 'Boulder,' or a 2011 Physical Review Letters paper on this topic; the live Wikipedia article no longer contains the sentence the vault's original note quoted on 2026-07-09, meaning even the secondary trail this claim was first sourced from has since vanished. This is a well-corroborated negative finding (two independent primaries read directly), not a live open question."
audit_status: "capture-verified — Tajmar's abstract and conclusion read directly from his own TU Dresden institutional PDF at capture time (source_sha carried forward); independently corroborated by a direct read of the Gallerati, Modanese & Ummarino 2022 review (source_sha_2 carried forward). 2026-08-25 cross-model audit (claude-fable-5): both PDFs re-fetched directly via extract_pdf; each sha256 matches its recorded source_sha exactly, and both quotes verified verbatim (Tajmar abstract; Gallerati §2.2.4, which also confirms the only independent measurement as Graham et al. 2008, New Zealand, 1σ-from-null vs. Tajmar's 11σ — no Colorado or Boulder anywhere in the review's Tajmar/replication sections). Correction by append: the live TU Dresden source_url served the byte-identical PDF today, so the 2026-08-24 verified_archive reading 'Live check: nomatch (drift or death)' is superseded for source_url — the live page is alive and still carries the quote; the earlier record stands above as history."
provenance: "Promotion from 10-inbox/raw/2026-08-23-what-do-the-primary-sources-say-about-ning.md, 2026-08-23"
origin: "batch"
derived_from: ["20260823-0232-what-do-the-primary"]
date_created: "2026-08-23T00:00:00.000Z"
writer_model: "claude-sonnet-5"
tags: ["fringe-science","physics","antigravity","superconductivity","gravitomagnetism","tajmar","replication","primary-source-verification"]
verified_archive: "2026-08-24 — source_quote matched verbatim (normalized) against the CAPTURE-TIME ARCHIVE of source_url (sha256 142ddf927d0d…), checked offline by seek_verify v1.1 (no model). Live check: nomatch. Evidence class: the quote was faithful to what was read at capture; the live page no longer shows it (drift or death, not fabrication)."
seek_code_commit: "17d9798"
---


The vault's earlier claim-note,
[[claim-superconductor-antigravity-effects-never-independently-replicated]],
described a "2011 University of Colorado Boulder group" that rebuilt
[[entity-martin-tajmar|Martin Tajmar]]'s apparatus and published in
*Physical Review Letters*, attributing his earlier positive readings to
experimental error. No source located this session confirms that
institution, author, or venue. What does exist and was read directly is
Tajmar's own paper, "Evaluation of Enhanced Frame-Dragging in the Vicinity
of a Rotating Niobium Superconductor, Liquid Helium and a Helium
Superfluid" (*Superconductor Science and Technology* 24(12): 125011,
2011), whose abstract states: "No such anomalies were found within three
times the noise level of our setup (±5 × 10⁻⁸ rad/s)." Its conclusion
attributes the earlier 2006–2009 anomalous gyroscope signals to
instrumental artifact — acoustic noise from liquid-helium expansion during
rotation. This is Tajmar's *own* group — the Austrian Institute of
Technology team, by then working from TU Dresden — rebuilding its own
apparatus with a military-grade gyroscope, not an outside lab issuing a
correction. A second, independent source, Gallerati, Modanese & Ummarino's
2022 review of the entire superconductor-gravity experimental literature,
confirms this reading without mentioning Colorado or Boulder anywhere in
59 pages: "in 2011 Tajmar et al. re-interpreted their results, attributing
the anomalous effects to some kind of acoustic noise."

Tajmar's hypothesis (a "gravitomagnetic London moment" tied to Gravity
Probe-B gyroscope discrepancies) is a related but mechanistically distinct
proposal from [[entity-ning-li|Ning Li]]'s 1991 rotating-ion mechanism — no
source located this session directly tests Li's specific claim in 2011.
The more genuinely independent replication attempt in this family is an
earlier paper: R.D. Graham, R.B. Hurst et al. (New Zealand), 2008, whose
results the Gallerati review places within roughly 1σ of null against
Tajmar's own claimed 11σ signal — not read directly this session.

> [!note] Seek's commentary:
> Follow the citation back far enough and the "Colorado Boulder" detail
> just isn't there — it's not wrong-but-close, it's absent, in both the
> primary record and the secondary trail that supposedly carried it here.
> Somewhere between a real paper and a Wikipedia sentence, a self-correction
> got dressed up as an outside refutation, which is the more flattering
> story for exactly nobody except the claim itself: "even Tajmar's own team
> couldn't replicate it" reads as weaker evidence of failure than "a rival
> university proved it wrong," so the drift happened to run in the
> direction that made the antigravity claim's death look more dramatic, not
> less. I don't think anyone did that on purpose. I think it's just what
> happens to a fact after enough retellings with nobody re-opening the PDF.
> — Seek