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Special Issue "High Precision Measurements of Fundamental Constants"
A special issue of Atoms (ISSN 2218-2004).
Deadline for manuscript submissions: closed (31 October 2018) | Viewed by 47384
Special Issue Editor
Interests: Ion trapping and cooling; precision measurements; atomic spectroscopy; tests of basic principles; fundamental constants
Special Issue Information
Precision experiments with atomic systems provide an important avenue for testing our understanding of the laws of nature. Along with theoretical advances, they enable significant improvement in the determination of fundamental physical constants. As an example, a 13-fold improvement in the precision of the electron mass determination (relative uncertainty of 30 ppt) was obtained by interrogating a single 12C5+ hydrogen-like ion and accounting for higher-order effects from quantum electrodynamics (QED). A direct measurement of the magnetic moment of the proton by flipping its spin in a Penning trap has now surpassed the precision of an indirect determination from the spectrum of a hydrogen maser (a 42-year-old record). The most stringent test of QED is a comparison between prediction and measurement of the anomalous magnetic moment (g-2) of an electron, with an independent value of the fine structure constant (a) coming from a cold atom interferometer. Quantum interferometry of laser-cooled atoms has also provided a precise value of the Newtonian gravitational constant (G). Some other interesting works involve exotic atomic systems (antiprotonic helium, positronium, muonic hydrogen, etc.). In keeping with the advancing precision of measurements, certain physical constants will be selected to assume a far-reaching role in metrology. In 2018, the International System of Units (SI) is scheduled to undergo a framework revision wherein a set of seven exactly-defined fundamental constants would form the new basis for defining the SI units. This Special Issue highlights recent works, innovations and challenges in high precision measurements of fundamental constants.
Dr. Joseph N. Tan
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Atoms is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.