IFIC Seminar: Quantum metrology - from LIGO to quantum information and back

por Rafal Demkowicz-Dobrzanski (University of Warsaw)

martes 17 nov. 2026 12:00 → 13:00 Europe/Madrid

1001-Primera-1-1-1 - Paterna. Seminario (Universe)

LIGO gravitational wave detectors are among the most spectacular achievements of our civilisation in the field of precise measurements. They are also an ideal platform to test cutting-edge ideas of quantum metrology, where non-classical properties of light are used to improve the sensitivity of the devices. At the same time, in recent years we have observed significant development in theoretical quantum metrology, which combines fundamental ideas of quantum estimation theory with a quantum information perspective on the optimisation of metrological protocols. This has made it possible to identify fundamental bounds on the precision of quantum-enhanced metrological devices that cannot be overcome, no matter how sophisticated the quantum techniques applied are. Amazingly, the performance of present-day gravitational wave detectors comes close to these fundamental limits.