Observation of spin flips with a single trapped proton
Open accessAbstract
Radio-frequency induced spin transitions of one individual proton are observed. The spin quantum jumps are detected via the continuous Stern-Gerlach effect, which is used in an experiment with a single proton stored in a cryogenic Penning trap. This is an important milestone towards a direct high-precision measurement of the magnetic moment of the proton and a new test of the matter-antimatter symmetry in the baryon sector.
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In Penning trap experiments, typical RF resonators have Q ~ 10^4, so the particle's energy is irreversibly dissipated almost instantly and τ = 1/Ω is the resistive cooling time constant.
“In Penning trap experiments such as in Refs.33-35, typical values of the used RF resonators 36 are Q 10 4 .Thus, in those cases, once delivered to the resonator, the particle's energy is irreversibly dissipated almost instantly 37 and s ¼ 1=X is denoted as the “resistive cooling time constant.””
From Coherent coupling of a trapped electron to a distant superconducting microwave cavity (2020) · cites this paper as [35]
On p. 2, the paper reports a resonator quality factor of about 5700 and says the proton cools resistively through its interaction with the tank circuits. On p. 3, it defines a cooling time constant, τ_z, but does not give it as 1/Ω or state that energy delivered to the resonator is irreversibly dissipated almost instantly. Its reported Q values also do not establish a typical value of 10^4 across Penning-trap experiments. (LLM, conf=0.86)
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References 18 · Cited by 89
- Authors
- Ulmer, S., Rodegheri, C. C., Blaum, K., Kracke, H., Mooser, A., Quint, W., & Walz, J.
- Affiliations
- Johannes Gutenberg University Mainz (DE)
- Heidelberg University (DE)
- GSI Helmholtz Centre for Heavy Ion Research (DE)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2011-06-20
- Volume
- 106
- Issue
- 25
- Pages
- 253001-253001
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1985888877
- Cited by
- 89
- References
- 18
- Citations by year
- 2026: 2 · 2025: 2 · 2024: 6 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 5 · 2019: 4 · 2018: 7 · 2017: 8 · 2016: 4 · 2015: 6 · 2014: 10 · 2013: 13 · 2012: 7
- FWCI
- 6.42
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Max Planck Digital Library (submittedVersion)
- MPG.PuRe (Max Planck Society) (submittedVersion)
- GSI Repository (German Federal Government) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Subatomic Physics Research
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Molecular Physics
- Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Particle physics theoretical and experimental studies
- Keywords
- spin flip, Stern-Gerlach effect, proton magnetic moment, matter-antimatter symmetry, baryon sector, quantum jumps
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