电动力学中Lorentz破坏信号的新极限
A New Limit on Signals of Lorentz Violation in Electrodynamics
摘要:
我们描述了一个实验的结果来测试时空各向异性条款,可能存在的洛伦兹违反。该装置由一对圆柱形超导腔稳定振荡器组成,振荡器工作在TM_{010}模式下,一个轴为东西向,另一个轴垂直。空间各向异性检测通过监测拍频在恒星率及其第一谐波。我们在10^{13}中的一部分没有看到各向异性。这使得一般标准模型扩展中的四个参数线性组合具有可比性的界限,而其他三个参数的界限较弱,<4 x 10^{-9}。
英文摘要:
We describe the results of an experiment to test for spacetime anisotropy terms that might exist from Lorentz violations. The apparatus consists of a pair of cylindrical superconducting cavity-stabilized oscillators operating in the TM_{010} mode with one axis east-west and the other vertical. Spatial anisotropy is detected by monitoring the beat frequency at the sidereal rate and its first harmonic. We see no anisotropy to a part in 10^{13}. This puts a comparable bound on four linear combinations of parameters in the general Standard Model extension, and a weaker bound of <4 x 10^{-9} on three others.
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