Title: Quantum nondemolition measurements
Author: VB Braginsky, YI Vorontsov, KS Thorne - Science, 1980 - science.org
Description: Some future gravitational-wave antennas will be cylinders of mass∼ 100 kilograms, whose
  end-to-end vibrations must be measured so accurately (10–19 centimeter) that they behave …