Project description
Building scalable quantum platforms with germanium
Planar Ge/SiGe quantum wells offer a promising foundation for building scalable quantum systems. They enable the creation of quantum dots (structures that trap and control electrons) that host spin qubits – units used for fast quantum information processing. When coupled with semiconductors, they also allow the formation of specialised arrangements of quantum dots, called Kitaev chains, to host Majorana bound states. The latter are highly stable quantum states ideal for storing information. Planar germanium avoids nuclear spin interference, ensuring compatibility with state-of-the-art spin qubits. Supported by the Marie Skłodowska-Curie Actions programme, the MaSC project will target three goals: building a basic Kitaev chain, developing tools for fast and precise information readouts, and connecting Majorana bound states with spin qubits to work seamlessly.
Objective
MaSC (Majorana-Spin Coupling in Planar Germanium) aims to combine Majorana bound states (MBSs) and spin qubits (SQs) in a single, scalable platform: planar Ge/SiGe quantum wells. Such a semiconductor stack is ideal to form gate-defined quantum dots (QDs) hosting state-of-the-art SQs. QD arrays can also host fine-tuned MBSs when coupled by superconductors, implementing a Kitaev chain (KC). This was recently demonstrated in InSb nanowires and planar InSbAs; however, those platforms are not readily compatible with state-of-the-art SQs due to nuclear spins. Therefore, MaSC aims to port KCs to planar germanium and couple MBSs and SQs.
To build up to this, MaSC sets three objectives: (1) realise a first, minimal KC in planar germanium; (2) integrate high-impedance on-chip resonators to enable fast, single-shot dispersive readout of the chain; (3) resolve coherent coupling between MBSs and an additional QD hosting one SQ.
The approach combines design, nanofabrication, and cryogenic measurements, using established platinum annealing to pattern superconducting PtSiGe to proximitise the QDs and realise a KC, and NbN or NbTiN superconducting strips to integrate field-resilient on-chip resonators, all on the same platform.
These deliverables advance the Work Programme by strengthening European capability in quantum nanoelectronics and by establishing a concrete basis for a hybrid quantum computation platform that combines fast SQs with robust MBS memories.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences inorganic chemistry transition metals
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering computer hardware quantum computers
- natural sciences physical sciences electromagnetism and electronics semiconductivity
- natural sciences physical sciences electromagnetism and electronics superconductivity
- engineering and technology nanotechnology nanoelectronics
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
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(opens in new window) HORIZON-MSCA-2025-PF
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1015 Lausanne
Switzerland
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