Introduction to the Special issue Spectroscopic Tests of Fundamental Physics
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چکیده
http://dx.doi.org/10.1016/j.jms.2014.04.004 0022-2852/ 2014 Elsevier Inc. All rights reserved. This special issue of the Journal of Molecular Spectroscopy highlights the recent advances in the use of molecular spectroscopy to test fundamental physics. It follows a special session on the same subject at the 68th International Symposium of Molecular Spectroscopy held on 17–18 June 2013 at The Ohio State University. Due to the possibilities of achieving increased precision in frequency measurements, the development of ultrastable lasers, extremely accurate atomic and molecular clocks, and techniques to produce and control ultracold samples of molecules, spectroscopic methods are now being employed to test our physical understanding of the Universe as laid out in General Relativity (GR) and the Standard Model (SM), and search for physics beyond these grand schemes. The principal idea is that the effects of new physics (e.g. that beyond the tenants of GR and SM)manifest themselves in minute shifts in quantum level structure of atoms and molecules. Physics that is normally associated with the TeV-scale can be probed in measurements at the feV level. Molecules, and molecular spectroscopy, is currently shifting to the forefront, because some phenomena and effects searched for are specifically enhanced in some of the nearly infinite variety of molecular species. Four, interrelated, facets of fundamental physics are strongly impacted by molecular spectroscopy:
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