How do bar detectors work in gravitational wave detectors?

[Josiah]

TL;DR

How do bar detectors work

Hi, I was just wondering how bar detectors work. From what Ive read, the electrons act as one, thus accentuates the effect of a single gravitational wave.

 

[Josiah]

Or do the electrons in this state absorb more gravitational waves, thus the effect is magnified and can be detected

 

[PeterDonis]

From what Ive read

What have you read? Please give specific references.