New quantum test could improve gravitational wave detector sensitivity
Physicists have developed a way to test whether radiation behaves as quantum theory predicts, while eliminating interference from background noise. The technique could help upgrade detector systems used in everything from gravitational wave observatories to precision measurement instruments, removing a major technical barrier to enhanced sensitivity.
Originaltitel: Detector correlations and null tests of the coherent state hypothesis
<p>We discuss the statistics of correlations between two resonant detectors. We show that this allows simple null tests of the coherent state hypothesis, free of vacuum (quantum) noise. Complementary aspects of the radiation field, e.g. squeezing in number or phase, can be revealed through appropriate detection strategies.</p>