Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 42, Issue 15, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-4075/42/15/154022
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- Japan Society for the Promotion of Science
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This paper proposes the detection of the variation in the proton-to-electron mass ratio beta by measuring a pure vibrational transition frequency of a cold CaH+ ion. The uncertainty of the this frequency can potentially be on the order of 10(-16), because the uncertainties of the Zeeman and Stark shifts are lower than 10(-16) and the electric quadrupole shift is zero. It is practicable to produce a CaH+ ion at a certain quantum state and perform sympathetic cooling by using the collisions with a laser-cooled Ca+ ion.
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