Obiettivo A fundamental aspect of quantum mechanics is the balance between information and disturbance by the measurement. A textbook example is the measurement of a position of an object which imposes a random perturbation on its momentum. This perturbation, the quantum back action, translates with time into uncertainty of the motion trajectory. The PI has proposed an approach which allows for simultaneous measurements of arbitrary small disturbances in both the position and the momentum. It is based on a measurement performed in a quantum reference frame with an effective negative mass, or frequency for an oscillator. Recently the PI’s group has experimentally demonstrated the first step along this novel path - quantum back action evasion for the measurement of motion in a reference frame of a spin oscillator.We propose a project which takes detection of motion to a new frontier. We will develop a novel hybrid quantum system involving disparate macroscopic objects, a mechanical oscillator and a reference spin oscillator with the effective negative mass. We will demonstrate quantum entanglement between the two oscillators and entanglement-enhanced sensing of force and acceleration. The technology for high quality mechanical and spin oscillators developed at the PI’s group will be further advanced towards those goals.We will generate manifestly non-classical states of millimetre size mechanical oscillators and a macroscopic coherent superposition of distant spin and mechanical objects. We will furthermore work towards generation of multi-partite entangled states of spins, macroscopic objects, and photons, thus testing fundamental limits of entanglement and decoherence for large and complex systems. Gravitational wave interferometers which have recently detected first gravitational waves are expected to be soon limited in their sensitivity by the quantum back action. The way to overcome this limit using the approach developed within this project will be explored. Campo scientifico natural sciencesphysical sciencesquantum physicsnatural sciencesphysical sciencesastronomyobservational astronomygravitational wavesnatural sciencesphysical sciencestheoretical physicsparticle physicsphotons Programma(i) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Argomento(i) ERC-2017-ADG - ERC Advanced Grant Invito a presentare proposte ERC-2017-ADG Vedi altri progetti per questo bando Meccanismo di finanziamento ERC-ADG - Advanced Grant Istituzione ospitante KOBENHAVNS UNIVERSITET Contribution nette de l'UE € 2 178 574,00 Indirizzo NORREGADE 10 1165 Kobenhavn Danimarca Mostra sulla mappa Regione Danmark Hovedstaden Byen København Tipo di attività Higher or Secondary Education Establishments Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Partecipazione a programmi di R&I dell'UE Opens in new window Rete di collaborazione HORIZON Opens in new window Costo totale € 2 178 574,00 Beneficiari (1) Classifica in ordine alfabetico Classifica per Contributo netto dell'UE Espandi tutto Riduci tutto KOBENHAVNS UNIVERSITET Danimarca Contribution nette de l'UE € 2 178 574,00 Indirizzo NORREGADE 10 1165 Kobenhavn Mostra sulla mappa Regione Danmark Hovedstaden Byen København Tipo di attività Higher or Secondary Education Establishments Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Partecipazione a programmi di R&I dell'UE Opens in new window Rete di collaborazione HORIZON Opens in new window Costo totale € 2 178 574,00
