科研之友
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摘要
We report on the search for Lorentz-violating sidereal variations of the frequency difference of colocated spin species while the Earth and hence the laboratory reference frame rotates with respect to a relic background field. The comagnetometer used is based on the detection of freely precessing nuclear spins from polarized He-3 and Xe-129 gas samples using SQUIDs as low-noise magnetic flux detectors. As result we can determine the limit for the equatorial component of the background field interacting with the spin of the bound neutron to be (b) over tilde (n)(perpendicular to) < 3.7 . 10(-32) GeV (95% C.L.).
- 出版日期2010-12-29
