Descrizione del progetto
Un passo avanti verso l’intrappolamento quantistico a lunga distanza
I dispositivi quantistici scalabili che generano e distribuiscono l’intrappolamento quantistico su grandi distanze rivoluzioneranno le comunicazioni e la tecnologia. Attualmente, l’uso dei punti quantici (QD, quantum dots) per la distribuzione a lunga distanza di fotoni intrecciati è difficile a causa della mancanza di controllo sulla struttura elettronica dei punti stessi. Tuttavia, alcuni ricercatori hanno recentemente introdotto una nuova tecnologia ibrida che combina campi esterni per modificare le strutture elettroniche dei punti quantici, consentendo la generazione di fotoni di alta qualità singoli e intrecciati per polarizzazione. Finanziato dal Consiglio europeo della ricerca, il progetto SPQRel mira a sviluppare ulteriormente questa tecnologia ibrida per consentire il funzionamento di protocolli di comunicazione quantistica avanzati. Le attività del progetto comprendono lo sviluppo di una sorgente di fotoni controllata elettricamente che generi fotoni indistinguibili ed intrecciati di qualsiasi frequenza e la costruzione di una rete quantistica.
Obiettivo
The development of scalable quantum devices that generate and distribute quantum entanglement over distant parties will bring about a revolution in communication science and technology. Epitaxial quantum dots (QDs) embedded in conventional diodes are arguably the most attractive quantum devices, since they combine the capability of QDs to deliver triggered and high-quality entangled photons with the tools of the mature semiconductor technology. However, it is at present impossible to use remote QDs for the distribution of entangled photons over large distances, mainly due to the lack of control over their electronic structure.
Recently, the PI has grasped that the solution to this problem resides in hybrid technologies. He has conceived and developed a novel class of semiconductor-piezoelectric quantum devices where different external fields are combined to reshape the electronic structure of any arbitrary QD so that single and polarization-entangled photons can be generated with unprecedented quality, efficiency, and speed, a major breakthrough for solid-state-based quantum communication.
In this project the PI will make the next pioneering step and develop the hybrid technology to the limit where advanced quantum communication protocols previously inaccessible to QDs can now be performed. The objective of the proposal is mainly to i) develop the first electrically-controlled wavelength-tunable source of indistinguishable and entangled photons, which can be exploited to ii) teleport entanglement over two distant QD-based qubits (the quantum relay) and to iii) attempt the construction of a quantum network where entangled photons from remote quantum relays are interconnected using warm atomic vapours.
The new hybrid technology that will be developed in this project to achieve i) will open new grounds in research fields well beyond quantum optics and quantum communication, and in particular the whole research area of strain-engineering of semiconductor thin-films.
Campo scientifico
- natural sciencesphysical sciencesoptics
- natural sciencesphysical scienceselectromagnetism and electronicssemiconductivity
- natural sciencesphysical sciencesquantum physicsquantum optics
- engineering and technologyelectrical engineering, electronic engineering, information engineeringelectrical engineeringpiezoelectrics
- natural sciencesphysical sciencestheoretical physicsparticle physicsphotons
Programma(i)
Argomento(i)
Meccanismo di finanziamento
ERC-STG - Starting GrantIstituzione ospitante
00185 Roma
Italia