Scientists from the United States presented a model of the operation of gravitational wave detectors, which allow you to study the Universe without additional interference. The device will allow you to study even remote and weak signals.
The researchers explained that gravitational wave detectors have allowed the universe to be studied in new ways – for example, by measuring the pulsations in space-time that occur when black holes and neutron stars collide. However, these devices are limited by quantum fluctuations caused by light reflected from mirrors. Therefore, scientists tried to improve the sensitivity of the detectors by removing these limitations.
They presented an experimental bench for studying and eliminating noise from quantum feedback. The researchers carried out two measurements of the position of a macroscopic object, whose motion is dominated by quantum feedback, and showed that by making a simple change to the circuit, they can remove quantum effects from the measurement of displacement. By using the correlations between the phase and the intensity of the optical field, the quantum feedback is eliminated.
Garrett Cole, Technology Manager at Thorlabs Crystalline Solutions, and his team built the micromechanical mirrors from an epitaxial multilayer layer. They were built into the device to check how much the detector became more sensitive to signals around.
“By performing this measurement on a mirror visible to the naked eye, at room temperature and at frequencies audible to the human ear, we bring the subtle effects of quantum mechanics closer to the realm of human experience,” the researchers noted. “By making the noises quieter, now we can study more scientifically interesting notes of the cosmic symphony.”