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arxiv: 2606.28078 · v1 · pith:ZKREUYYFnew · submitted 2026-06-26 · 🪐 quant-ph · physics.atom-ph

Single Electrons in a Dual-Plane Printed-Circuit-Board Penning Trap

Zirui Fang , Benedict A. D. Sukra , Xing Fan This is my paper

Pith reviewed 2026-06-29 04:01 UTC · model grok-4.3

classification 🪐 quant-ph physics.atom-ph
keywords Penning trapsingle electronprinted circuit boardplanar trapquantum informationelectron trappinglow magnetic field
0
0 comments X

The pith

A dual-plane printed-circuit-board Penning trap traps and detects single electrons at low magnetic fields.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper shows that single electrons can be loaded, trapped, and detected in a planar Penning trap built from printed circuit boards arranged in two parallel planes. It reports deterministic loading, axial damping rates, temperature estimates, and magnetron-radius growth caused by collisions. These measurements establish that the geometry produces usable trapping potentials without requiring traditional machined electrodes. If the signals indeed arise from individual electrons, the approach supplies a route to two-dimensional arrays of traps that can be fabricated by standard circuit-board methods.

Core claim

We demonstrate single-electron trapping and detection in a two-dimensionally scalable dual-plane printed-circuit-board Penning trap. We characterize deterministic electron loading, axial damping, axial temperature, and collision-induced magnetron-radius growth at low magnetic fields.

What carries the argument

The dual-plane printed-circuit-board Penning trap, whose electrode layout on two parallel boards generates the electric and magnetic fields needed to confine individual electrons.

If this is right

  • Deterministic loading allows controlled introduction of one electron at a time into the trap.
  • Axial damping and temperature measurements quantify the cooling and thermal environment experienced by the trapped electron.
  • Collision-induced magnetron growth provides a diagnostic of background gas interactions at low fields.
  • The printed-circuit-board construction permits two-dimensional scaling of trap arrays by standard fabrication techniques.
  • The platform supplies a concrete next step toward quantum-information applications that require many individually addressable electrons.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Integration with on-board microwave lines or optical access could become straightforward because the electrodes are already on circuit boards.
  • The same electrode pattern might support simultaneous trapping of multiple species or charged particles of different masses if the magnetic field and voltages are adjusted accordingly.
  • Low-field operation reduces the need for large superconducting magnets, potentially allowing compact table-top experiments.

Load-bearing premise

The recorded signals and dynamics arise from single electrons rather than from groups of electrons or from measurement artifacts, and the printed-circuit-board electrode pattern creates stable trapping wells at the low magnetic fields employed.

What would settle it

Observation of signals whose amplitude or frequency statistics match an ensemble of many electrons, or loss of trapping when the magnetic field is lowered to the reported values, would show that individual-electron confinement has not been achieved.

Figures

Figures reproduced from arXiv: 2606.28078 by Benedict A. D. Sukra, Xing Fan, Zirui Fang.

Figure 1
Figure 1. Figure 1: FIG. 1. (a) Cryogenic section of the dual-plane Penning trap, (b) zoom-in near the trap assembly , and (c) the actual PCBs. [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: FIG. 2. (a) Deterministic loading of single electrons. A strong [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: FIG. 3. Measurement of the axial temperature [PITH_FULL_IMAGE:figures/full_fig_p004_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: FIG. 4. (a) Monitored axial dip frequency as a function of [PITH_FULL_IMAGE:figures/full_fig_p005_4.png] view at source ↗
Figure 7
Figure 7. Figure 7: FIG. 7. Proposed magnetic bottle location in a [PITH_FULL_IMAGE:figures/full_fig_p006_7.png] view at source ↗
Figure 6
Figure 6. Figure 6: FIG. 6. (a) Monitored axial dip frequency as a function of [PITH_FULL_IMAGE:figures/full_fig_p006_6.png] view at source ↗
Figure 8
Figure 8. Figure 8: FIG. 8. Determination of the misalignment between the trap’s [PITH_FULL_IMAGE:figures/full_fig_p007_8.png] view at source ↗
read the original abstract

We demonstrate single-electron trapping and detection in a two-dimensionally scalable dual-plane printed-circuit-board Penning trap. We characterize deterministic electron loading, axial damping, axial temperature, and collision-induced magnetron-radius growth at low magnetic fields. These results establish a practical platform for planar Penning traps and identify key next steps toward applications in quantum information science.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 2 minor

Summary. The manuscript demonstrates single-electron trapping and detection in a two-dimensionally scalable dual-plane printed-circuit-board Penning trap. It characterizes deterministic electron loading, axial damping, axial temperature, and collision-induced magnetron-radius growth at low magnetic fields, positioning the dual-plane PCB geometry as a practical platform for planar Penning traps toward quantum information science applications.

Significance. If the central experimental claims hold, the work establishes a scalable, PCB-based approach to Penning traps that operates at low magnetic fields. This could lower barriers to integration with other quantum technologies and enable two-dimensional trap arrays, providing a concrete experimental foundation rather than a purely theoretical proposal.

major comments (1)
  1. [Results section (characterization of loading and signals)] The evidence presented for single-electron (as opposed to ensemble) occupancy relies on observed axial damping, temperature, and magnetron growth, but the manuscript does not provide quantitative thresholds, statistical tests, or direct comparisons to multi-electron signals that would rule out alternative interpretations. This distinction is load-bearing for the title and abstract claim.
minor comments (2)
  1. [Abstract] The abstract states 'low magnetic fields' without numerical values; include the specific B-field range (e.g., in the first paragraph of the results) for immediate context.
  2. [Figure captions] Figure captions should explicitly note the number of experimental runs or averaging used for each trace to allow assessment of reproducibility.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the constructive report and positive assessment of the work's significance. We address the single major comment below and have revised the manuscript to strengthen the presentation of evidence for single-electron occupancy.

read point-by-point responses

  1. Referee: [Results section (characterization of loading and signals)] The evidence presented for single-electron (as opposed to ensemble) occupancy relies on observed axial damping, temperature, and magnetron growth, but the manuscript does not provide quantitative thresholds, statistical tests, or direct comparisons to multi-electron signals that would rule out alternative interpretations. This distinction is load-bearing for the title and abstract claim.

    Authors: We thank the referee for identifying this point. The original manuscript infers single-electron occupancy from the deterministic loading statistics, axial damping rates matching single-particle predictions, temperature values extracted from thermal noise, and magnetron growth consistent with single-particle theory at low B. These signatures are theoretically distinct from ensemble behavior. Nevertheless, we agree that explicit quantitative support improves clarity. The revised manuscript adds: calibrated amplitude thresholds distinguishing one versus multiple electrons, Poisson statistics from repeated loading trials, and direct side-by-side comparisons with multi-electron signals obtained in the same apparatus. These additions appear in a new subsection of Results with accompanying text and figures; the core claims and interpretation remain unchanged. revision: yes

Circularity Check

0 steps flagged

No significant circularity; experimental demonstration only

full rationale

The paper is an experimental report of single-electron trapping and detection in a dual-plane PCB Penning trap. It characterizes observed behaviors (axial damping, temperature, magnetron growth) at low B fields but contains no derivation chain, fitted parameters renamed as predictions, or self-citation load-bearing steps. The central claim rests on direct observation rather than any equation that reduces to its own inputs by construction. This matches the default expectation of no circularity for experimental work without theoretical predictions.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Experimental work; no free parameters, axioms, or invented entities extracted from abstract.

pith-pipeline@v0.9.1-grok · 5579 in / 858 out tokens · 33331 ms · 2026-06-29T04:01:33.828583+00:00 · methodology

discussion (0)

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Reference graph

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