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As I was falling asleep I designed two types of gravitational wave detectors. In the morning I realized one is very susceptible to noise.
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(I know I’m totally ignoring sensitivity here. But the principle of the 3D array of atomic clocks feels sound to me.)
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The other is 3 orthogonal condenser microphones in a vacuum. But I realized that would also pick up electromagnetic noise.
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One is a 3 ✕ 3 ✕ 3 array of atomic clocks to detect a ripple of time dilation.