Ion-trap measurements of electric-field noise near surfaces
By M. Brownnutt, M. Kumph, Peter Rabl, Rainer Blatt. 2014
347 citations recorded by the source corpus.
Electric-field noise near surfaces is a common problem in diverse areas of physics, and a limiting factor for many precision measurements. There are multiple mechanisms by which such noise is generated, many of which are poorly understood. Laser-cooled, trapped ions provide one of the most sensitive systems to probe electric-field noise at MHz frequencies and over a distance range 30 - 3000 $\mu$m from the surface. Over recent years numerous experiments have reported spectral densities of electric-field noise inferred from ion heating-rate measurements and several different theoretical explanations for the observed noise characteristics have been proposed. This paper provides an extensive summary and critical review of electric-field noise measurements in ion traps, and compares these experimental findings with known and conjectured mechanisms for the origin of this noise. This reveals that the presence of multiple noise sources, as well as the different scalings added by geometrical considerations, complicate the interpretation of these results. It is thus the purpose of this review to assess which conclusions can be reasonably drawn from the existing data, and which important questions are still open. In so doing it provides a framework for future investigations of surface-noise processes.
Subfields: Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/73d0ee375f0a113a235e8e9d579ad904f59acaaf
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In Atomic and Molecular Physics, and Optics
- Z. Idziaszek
- Michal Tomza
- José R. Crespo López-Urrutia
- P. Schmidt
- Marianna S. Safronova
- Mikhail G. Kozlov
- Kohei M. Itoh
- Tommaso Calarco
Citations in the corpus
- Highly charged ions: Optical clocks and applications in fundamental physics (2018, background): “They offer moderately large motional frequencies of up to several MHz to allow recoilfree spectroscopy in the Lamb-Dicke regime while maintaining potentially low motional heating rates of only a few motional quanta per second (Brownnutt et al., 2015).”
- Cold hybrid ion-atom systems (2017, background): “Although the atoms used are generally conducting, oxidation can occur over long periods in the vacuum system and charge contamination or the formation of dipoles on the electrode’s surface may compromise the ionic trapping field (Brownnutt et al., 2015).”
- Materials challenges and opportunities for quantum computing hardware (2021, methodology): “However, the various trends observed in experiments, which include frequency scaling, temperature dependence, and trap-electrode distance ( 301 , 304 – 306 ), do not conclusively support a single model, and multiple mechanisms likely contribute ( 291 ).”