Quantum optics laboratories at INRIM aim at studying quantum states of light both for fundamental research and development of new techniques which offer the possibility of going beyond the classical limits of measurement. These researches also pave the way for accurate methods for metrological characterisation of laser sources and detectors used in the emerging quantum technologies.
INRIM’s laboratories are equipped with the state of the art optical, electro-optical and quantum technologies (as laser sources, single-photons detectors …). This research activity was born in the late 90’s in the “C. Novero” laboratory in the former metrology institute “Istituto Elettrotecnico Nazionale ‘Galileo Ferraris’” and it is now involved in the most advanced research fields related to quantum optics as:
- development of new measurement paradigms for quantum states (weak measurements and optimal measurement of quantumness parameters);
- implementation of quantum imaging protocols in order to overcome the accuracy and resolution limits imposed by classical sources thanks to quantum correlation, characterising particular quantum states (sub-shot-noise microscopy, absolute spatial resolving detector calibration , ghost imaging and quantum illumination);
- quantum enhanced interferometry, where properties of quantum light offer the possibility to go beyond the classical limits of phase measurements;
- single photon sources (both heralded sources based on parametric-down-conversion and deterministic sources based on colour centres in diamonds electrically or optically excited);
- quantum communication, including the development of the necessary facilities to characterise quantum cryptography systems;
- experiments which aim at demonstrating the time nature as an emerging effect from quantum properties, and other studies of fundamental type.