Project description
High-fidelity gates in semiconductor quantum dots offer a path towards reliable quantum computers
Quantum gates are basic quantum circuits operating on a small number of qubits. They are essential elements of a quantum computer as they allow photons to interact with each other. Funded by the Marie Skłodowska-Curie Actions programme, the HIFIG project plans to develop a high-fidelity, efficient gate that should allow nonlinear interactions between two single photons. Researchers will leverage the spin state of a hole in an InAs/GaAs quantum dot to mediate the interaction between the photons considering that the coherence of the hole state measures several hundreds of nanoseconds. A novel microcavity structure should help boost the interaction between the photons and the quantum dot.
Objective
An efficient nonlinear quantum gate between two single-photons is highly desirable, as it will enable processing quantum information stored in optical photons. This capability is essential for building next generation of quantum networks, and optical quantum computing. However, such a device is constrained by lack of interaction between optical photons in natural environments. Interestingly, cavity quantum electrodynamics provides several paths towards achieving nonlinear interaction between photons. This action aims at realizing a high fidelity and efficient nonlinear gate between two single-photons using a compact solid-state design. Our approach is based on using the spin-state of a hole in an InAs/GaAs quantum dot to mediate the interaction between the photons. It has recently been demonstrated that the quantum coherence of the hole state can be on the order of several hundreds of nanoseconds. Also, the hole-states have been shown to have very coherent optical transitions which makes them an ideal candidate to realize spin-photon interfaces. In order to boost the interaction between the photons and the quantum dot, a novel microcavity structure will be used. The microcavity structure has recently been developed in the host group and shows spectacular features such as a Q-factor of 1 million, and a cooperativity of 100, making the combination of the hole-state and the microcavity structure an ideal platform to realize photonic gates. The results of this action will be highly instrumental for building quantum repeaters, and may open new directions for quantum computers based on optical photons. For instance, such a nonlinear gate may be combined with a linear network of coupled waveguides to enhance the simulation capabilities of the linear network. Finally, this action is aligned very well with the goals of the Quantum Technologies flagship initiative, and will contribute to the collective effort by the European researchers towards a lead in quantum technologies.
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.
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering computer hardware quantum computers
- natural sciences physical sciences theoretical physics particle physics photons
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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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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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Topic(s)
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.
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.
Funding Scheme
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.
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.
MSCA-IF-EF-ST - Standard EF
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2018
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
4051 Basel
Switzerland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.