What is recorded here?
Bohman and the BASE team sympathetically cooled a single proton by coupling it through a superconducting resonant circuit to laser-cooled beryllium ions in a separate Penning trap about nine centimetres away. Frequency spectra and controlled remote heating demonstrated energy exchange. Measurements of energy-dependent proton frequency shifts then showed a temperature reduction reaching 14.4±0.7 kelvin, relative to an effective circuit-noise temperature near 17 kelvin. The experiment extended sympathetic cooling beyond direct short-range Coulomb coupling.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The experiment measured the proton’s axial mode using calibrated, model-dependent frequency shifts. The quoted absolute final temperature, 2.6±2.5 kelvin, has much larger uncertainty than the temperature reduction. Other motional modes, antiproton cooling, ground-state preparation and improved fundamental-constant measurements were proposed extensions. The macroscopic circuit mode and trapped-particle motion were cooled; this does not mean the whole apparatus reached the inferred particle temperature.
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People and systems
M. Bohman; V. Grunhofer; C. Smorra; M. Wiesinger; C. Will; M. J. Borchert; J. A. Devlin; S. Erlewein; M. Fleck; S. Gavranovic; J. Harrington; B. Latacz; A. Mooser; D. Popper; E. Wursten; K. Blaum; Y. Matsuda; C. Ospelkaus; W. Quint; J. Walz; S. Ulmer
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.
Research locations and affiliations
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English catalogue narrative
Remote sympathetic cooling of a trapped proton through a superconducting circuit
Bohman and the BASE team sympathetically cooled a single proton by coupling it through a superconducting resonant circuit to laser-cooled beryllium ions in a separate Penning trap about nine centimetres away. Frequency spectra and controlled remote heating demonstrated energy exchange. Measurements of energy-dependent proton frequency shifts then showed a temperature reduction reaching 14.4±0.7 kelvin, relative to an effective circuit-noise temperature near 17 kelvin. The experiment extended sympathetic cooling beyond direct short-range Coulomb coupling.
Scientific scope
The experiment measured the proton’s axial mode using calibrated, model-dependent frequency shifts. The quoted absolute final temperature, 2.6±2.5 kelvin, has much larger uncertainty than the temperature reduction. Other motional modes, antiproton cooling, ground-state preparation and improved fundamental-constant measurements were proposed extensions. The macroscopic circuit mode and trapped-particle motion were cooled; this does not mean the whole apparatus reached the inferred particle temperature.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
M. Bohman; V. Grunhofer; C. Smorra; M. Wiesinger; C. Will; M. J. Borchert; J. A. Devlin; S. Erlewein; M. Fleck; S. Gavranovic; J. Harrington; B. Latacz; A. Mooser; D. Popper; E. Wursten; K. Blaum; Y. Matsuda; C. Ospelkaus; W. Quint; J. Walz; S. Ulmer
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.