Description du projet
Qubits spinorbitroniques: le catalyseur de l’informatique quantique à grande échelle
Les qubits, les unités d’information des ordinateurs quantiques, sont constitués de systèmes ayant deux états quantiques distincts qui peuvent être manipulés sans perdre leur cohérence. Pour réaliser l’énorme potentiel de l’informatique quantique, il faut relever le défi d’augmenter le nombre de qubits tout en conservant le contrôle de leurs propriétés. Le projet IQARO, financé par l’EIC, prévoit de développer des qubits spinorbitroniques, où le verrouillage du spin-momentum des électrons sera utilisé pour manipuler les degrés de liberté du spin, évitant ainsi la fabrication d’un micro-aimant sur la puce ou l’application de champs magnétiques RF, et autorisant le couplage des spins par photons, phonons ou couplage capacitif direct. Les qubits seront réalisés sous forme de points quantiques simples et doubles basés sur des gaz d’électrons 2D à interfaces d’oxyde.
Objectif
"The quest for the realization of ""fault tolerant"" quantum computation is currently challenged by the extreme fragility of quantum effects with respect to noise and decoherence. Quantum control, quantum initialization, read-out and enhanced coherence remain the main challenges which need to be addressed in a scalable multi-qubit platform. In the last few years there were tremendous advancements in the field of spin-orbitronics where the spin-degrees of freedom are manipulated with electric fields through the spin-momentum locking of the electrons. In spite of its importance, this property of materials characterized by large and tunable spin-orbit coupling (SOC), such as two-dimentional (2D) oxide materials, is not fully exploited in quantum computation. Here, we propose spin-orbitronics qubits and their experimental realization in single and double quantum dots based on 2D electron gases (2DEGs) formed at SrTiO3-based oxide interfaces. Due to their large spin-orbit splitting and gate-tunability, oxide interfaces are characterized by an exceptional degree of spin-momentum locking, and at the same time by a unique combination of high-mobility and 2D-magnetism. The exploitation of largely tunable SOC and spin-polarization in 2D systems, in combination with tunabilty of the host materials, is very attractive for a novel quantum computation platform as it allows a coherent quantum control of individual electron spins using spin to charge interconvertion. The proposed platform has all the characteristics for the practical implementation of an innovative quantum computation approach which allows upscaling to a large qubit numbers and goes beyond the one-dimensional interconnect schemes with important fundamental and technological advantages based on spin-orbitronics."
Champ scientifique
Programme(s)
- HORIZON.3.1 - The European Innovation Council (EIC) Main Programme
Régime de financement
HORIZON-EIC - HORIZON EIC GrantsCoordinateur
00185 Roma
Italie