Yuta Michimura, Nobuyuki Matsumoto, Noriaki Ohmae, Wataru Kokuyama, Yoichi Aso, Masaki Ando, Kimio Tsubono
We have developed an apparatus to test Lorentz invariance in the photon sector by measuring the resonant frequency difference between two counterpropagating directions of an asymmetric optical ring cavity using a double-pass configuration. No significant evidence for the violation was found at the level of $\delta c /c \lesssim 10^{-14}$. Details of our apparatus and recent results are presented.
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http://arxiv.org/abs/1307.5266
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