MultiQubit stands for Multi-Qubit Photonic Devices.
MultiQubit is a frontier research project running during 2021–2026, and supported by ERC Consolidator Grant (M€ 2.6) from the European Research Council (EU).

MultiQubit is built on the concept of a novel type of quantum dots — crystal-phase quantum dots — discovered and developed by us together with our collaborators. Crystal-phase quantum dots have a unique advantage — growth control with the ultimate accuracy of a single atomic layer. This advantage will break the major limitation in the field of optically-active quantum dots — impossibility to build quantum devices with multiple quantum dots due to lack of the required growth control — and thus unlock their true potential for Quantum Technologies. Based on these, MultiQubit is committed to creating a robust technological platform for making solid-state multi-qubit devices with a photonic interface. This platform shall be a game-changer in Quantum Technologies, that may connect quantum computers across the world. In particular, MultiQubit will develop and demonstrate all the steps from the fabrication of basic quantum structures to distributed entanglement between remote nodes of a multi-qubit Quantum Information Network. For the successful realization of these ideas, we identify three key objectives:

1. Explore and demonstrate a novel location qubit — the central element of MultiQubit. This qubit is based on crystal-phase quantum dots, which are fully designable and scalable, because we can control their geometry with the ultimate accuracy of a single atomic layer during growth.

2. Build the first designable and scalable multi-qubit quantum register with a photonic interface. This is one of the major components in Quantum Information Networks to be implemented.

3. Design and demonstrate a quantum network of multi-qubit photonic devices. This may be a potential prototype of the forthcoming Quantum Internet.

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Learn the concept:

Location qubits in a multi-quantum-dot system
D. Li and N. Akopian
arXiv:2107.05960 (2021), Video

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