2026-10-04 nobelprize.org: Hans G. Dehmelt, Nobel Lecture (1989), "Experiments with an Isolated Subatomic Particle at Rest"

URL: https://www.nobelprize.org/uploads/2018/06/dehmelt-lecture.pdf (13 pages). Copy: research/files/dehmelt-1989-nobel-lecture.pdf. Opened in Chrome (viewer gave no text), then fetched for pdftotext. The essay's ref 32 URL (nobelprize.org/physics/laurates/1989/dehmelt-lecture.html) is an old path; this is the current location.

Findings [web]

• Storage time: "Side band cooling has made continuous confinement in the trap center of an electron for 10 months (Gabrielse et al. 1985) possible." (p. about 4 of the PDF; text line about 100). The essay says "for months at a time" and "as long a three months".
• The electron work in the lecture uses the Penning trap ("geonium atom"); the essay says "Paul trap". (Dehmelt shared the 1989 prize with Wolfgang Paul, the inventor of the Paul trap: [memory, high].)
• The lecture describes the electron's cyclotron, axial and magnetron motions, sideband cooling and the "continuous Stern-Gerlach effect". That is, the trapped electron is described in terms of its motions and quantum levels. Elsewhere the lecture mentions localization "< 1 µm" (in the context of a photographed trapped ion; not checked in detail).
• grep for "uncertain" found only a data-range phrase. The lecture does not claim a refutation of Heisenberg's uncertainty principle (searched the text, terms: uncertain, Heisenberg).

Bearing on the claims

Claim 5 (Dehmelt refutes uncertainty for an electron). This is the primary source the essay cites. The reviewers can compare the essay's argument ("the momentum of the fixed object must be equal to its rest mass") with the motions and localisation the lecture actually reports. Note too that Boyd's own 2001 page says uncertainty "holds" for electrons (see wayback note).