如果按发射理论速度遵循伽利略叠加原理，是没有Sagnac效应的。

fu0:

Sagnac效应是彻头彻尾的在经典理论中预测、解释、验证的理论。和相对论没有任何关系。它早于相对论，不过有些相对论者说它是相对论的伟大验证。用相对论解释Sagnac效应，非常复杂，说涉及到广义相对论等很多时髦的名词 。

经典的理论是解释不了物质萨克效应的。

下边是有关介绍。我就不翻译了。

2.2 Universality of the Sagnac Effect

The experimental data show that: (i) the Sagnac fringe shift (1) does not
depend either on the presence of a co-moving optical medium or on the group
velocity of the counter-propagating beams; (ii) the Sagnac time difference
(2) does not depend either on the light wavelength or on the presence of a
co-moving optical medium. This is a first important clue of the universality
of the Sagnac effect. However, the most compelling claim for the universal
character of the Sagnac effect comes from the validity of eq. (1) not for light
beams only, but also for any kind of ”entities” (such as electromagnetic
and acoustic waves, classical particles and electron Cooper pairs, neutron
beams and De Broglie waves and so on...) travelling in opposite directions
along a closed path in a rotating interferometer, with the same (in absolute
value) velocity with respect to the turntable. This fact is well proved by experimental texts (see Subsection 2.3).

Of course the entities take different times for a complete round-trip, depending
on their velocity relative to the turntable; but the difference between
these times is always given by eq. (2). So, the amount of the time difference
is always the same, both for matter and light waves, independently of the
physical nature of the interfering beams.

This astounding but experimentally well proved ”universality” of the
Sagnac effect is quite inexplicable on the basis of the classical physics, and
invokes a geometrical explanation in the Minkowskian space-time of the
SRT.

2.3 Experimental tests and derivation of the Sagnac Effect
The Sagnac effect with matter waves has been verified experimentally using
Cooper pairs[41] in 1965, using neutrons[42] in 1984, using 40Ca atoms
beams[43] in 1991 and using electrons, by Hasselbach-Nicklaus[44], in 1993.
The effect of the terrestrial rotation on neutron phase was demonstrated in
1979 by Werner et al.[45] in a series of famous experiments.

这是一片关于原子萨克效应的文章。

需付费才能下载。

大家谁有办法搞到这片文章？沈博士有没有办法？？？

这个东东有点意思，有点“横向sagnac”的意思，
即似乎不是传统的sagnac概念，而是类似光的衍射实验，其实也就是类似我们的“大铁盆”了，
在“大铁盆”实验中就发现装置旋转引起的“光点偏移”很容易测量到，
（“旋转光点偏移”甚至在最早的“出租车实验”中就测量到了）
那么设想激光是通过一个光栅后得到了一些衍射条纹，然后再用光电管测量亮条纹的偏移量，
这就与“大铁盆实验”没有什么区别了，我也多次说过是否以后可以考虑做出很简易的测角速度的装置，
看来还真是有点这个意思呢，

不过更灵敏的类似实验应该是“原子束落点偏移实验”，因为原子的速度比光速慢不少，
现在的原子束速度一般在1000m/s左右，这样，灵敏度就是“光点偏移”的10^5倍，
早期的原子束衍射是用的杨氏双缝干涉，后来使用机械光栅，现在发展到使用激光驻波形成的栅栏了，
其实估计只要能设法把原子束聚焦到一个微点上，然后设法测量出这个原子落点的“横向偏移”就可以了，
大可不必这么麻烦？反正就是个“径向旋转sagnac效应”(或横向旋转sagnac)嘛？
（这里的“横向”是相对射束方向而言的）

具体参考《基于原子干涉的量子陀螺仪》(浙江大学 物理系 光学研究所）、
《利用原子干涉仪的相位调制进行绝对转动测量》、《原子激光陀螺》，
都是要付费下载的，暂时不敢随便侵权---提供附件下载了，


作为“速度计”的话就难说了，是否也会存在“横向源速偏斜”问题呢？
这是我对“原子干涉陀螺”的初步印象，各位看是不是这么回事呢？