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A new test of local Lorentz invariance using ²¹Ne-Rb-K comagnetometer
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We develop a new comagnetometer using $^{21}$Ne atoms with nuclear spin $I=3/2$ and Rb atoms polarized by spin-exchange with K atoms to search for tensor interactions that violate local Lorentz invariance. We frequently reverse orientation of the experiment and search for signals at the first and second harmonics of the sidereal frequency. We constrain 4 of the 5 spatial Lorentz-violating coefficients $c^n_{jk}$ that parameterize anisotropy of the maximum attainable velocity of a neutron at a level of $10^{-29}$, improving previous limits by 2 to 4 orders of magnitude and placing the most stringent constrain on deviations from local Lorentz invariance.
Forward citations
Cited by 3 Pith papers
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The paper reviews comagnetometry as a sensitive probe for new physics including EDMs, Lorentz violation, CP-violating forces, and axionic dark matter, while discussing prospects for further sensitivity gains based on ...
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