Tests of Special Relativity using Laser Spectroscopy (Physics)

高分辨率激光技术和存储环中粒子的高速分辨率将被结合起来检验狭义相对论的有效性。相对论多普勒频移实验将测试时间膨胀效应和光速的各向同性。实验基于双光子光谱学，其中原子通过同时吸收来自两束激光中的每束的光子来实现跃迁，一束在原子的方向上运动，另一束在原子的方向上运动。这允许内部抵消经典的一阶多普勒频移，留下相对论效应作为主导项。

High resolution laser techniques and high velocity resolution of particles in a storage ring will be combined to test the validity of special relativity. The relativistic Doppler shift experiments will test both the time dilation effect and the isotropy in the speed of light. The experiments are based on two photon spectroscopy, in which an atom makes a transition by simultaneously absorbing a photon from each of two laser beams, one traveling in and the other opposite to the direction of the atom. This allows internal cancellation of the classical first order Doppler shift, leaving the relativistic effects as the dominant term.