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SUPERconducting circuits for QUantum SENSing of microwave radiations.

Objective

Detecting microwave signals with ultimate sensitivity is critical to dark matter research, atomic-scale magnetic resonance, and quantum computing. The most sensitive microwave detectors available today — superconducting Josephson amplifiers — are fundamentally limited by the standard quantum limit (SQL). Within my ERC Starting Grant INGENIOUS, I developed the Single Microwave Photon Detector (SMPD), a superconducting quantum device that counts individual microwave photons and surpasses the SQL by orders of magnitude. I demonstrated its transformative impact in two landmark experiments: the first microwave detection of individual electron spins (Nature 2023) and a 20-fold acceleration of axion dark matter searches (PRX 2025).

The goal of SUPERQuSENSE is to validate the broader commercial potential of SMPD technology and formalize it into a market-ready product. A founding team of three PhDs whom I supervised is preparing the launch of the spinout company Qudigy in fall 2026. Five SMPD systems are committed for beta-testing at international laboratories and industry partners across three continents. This PoC project will fund the critical activities needed to transition from a physics-community spinout to a scalable deep-tech enterprise: a professional market analysis of mid-term application domains beyond the initial physics niche, a freedom-to-operate study, development of product-grade control software and custom electronics, and structured feedback collection from beta-testers to define the product roadmap.

Programme(s)

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Topic(s)

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Funding Scheme

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HORIZON-ERC-POC - HORIZON ERC Proof of Concept Grants

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Call for proposal

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(opens in new window) ERC-2026-POC

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Host institution

COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Net EU contribution

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.

€ 150 000,00
Address
RUE LEBLANC 25
75015 Paris
France

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Region
Ile-de-France Ile-de-France Paris
Activity type
Research Organisations
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Total cost

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.

No data

Beneficiaries (1)