Descrizione del progetto
Controllare l’emissione luminosa dalle nuvole atomiche
Quando una luce laser colpisce una nuvola di atomi, i fotoni vengono assorbiti da questi ultimi e gli elettroni passano a un livello di energia superiore; il loro ritorno allo stato fondamentale, invece, provoca l’emissione di un fotone. Ciononostante, nel caso della subradianza in una nuvola, la distanza tra ciascun atomo è inferiore rispetto a quella della lunghezza d’onda del fotone emesso, per cui l’emissione si annulla. Gli elettroni restano nel proprio stato eccitato e tutta l’energia di eccitazione viene intrappolata all’interno del sistema. Il progetto CORSAIR, finanziato dall’UE, intende migliorare la riproducibilità e il controllo di questo fenomeno in nuvole atomiche ordinate a una e due dimensioni.
Obiettivo
In the CORSAIR project, I propose to study and control subradiance, namely the suppression of collective spontaneous emission, in sub-wavelength arrays of two-level atoms, using a new atomic physics platform. Understanding and controlling how an ensemble of quantum emitters collectively emits or absorbs light is vital in several areas of science and technology. However, the description of this problem is a challenge since it amounts to a dissipative quantum many-body problem. This is why I propose to develop a new experimental research direction towards the following specific objectives: (i) The building of an experimental platform able to create ordered 1D and 2D arrays of atoms with sub-wavelength spacing, and high-fidelity detection of excitations in the arrays. (ii) The selective excitation of subradiant excitations, i.e. where collective spontaneous emission is strongly suppressed. I will develop an addressing scheme to populate a subradiant state with high fidelity and perform experiments demonstrating tailored light storage and retrieval, and metrological enhancement by subradiance. (iii) The understanding of how atomic correlations can be dissipatively engineered via subradiance. I will strive to observe the fermionic correlations that are predicted to emerge from collective decay in arrays, and I will map the phase diagram of a driven two-level atomic array. These objectives will be reached by developing dedicated new tools. I will use dysprosium, an atomic species with properties that allow novel cooling and trapping schemes that I propose to use. In the rich spectrum of Dy, I will isolate a two-level system with a narrow linewidth. I will further develop a novel addressing tool, that allows to drive an array with an alternating phase profile which directly excites a subradiant excitation. I will rely on a broad transition to perform time- and position-resolved high-fidelity measurements of excitations and correlations in the two-level arrays.
Campo scientifico
CORDIS classifica i progetti con EuroSciVoc, una tassonomia multilingue dei campi scientifici, attraverso un processo semi-automatico basato su tecniche NLP.
CORDIS classifica i progetti con EuroSciVoc, una tassonomia multilingue dei campi scientifici, attraverso un processo semi-automatico basato su tecniche NLP.
Parole chiave
Programma(i)
- HORIZON.1.1 - European Research Council (ERC) Main Programme
Argomento(i)
Meccanismo di finanziamento
HORIZON-ERC - HORIZON ERC GrantsIstituzione ospitante
75794 Paris
Francia