Robust Superconducting and hybrid Quantum bits
Latest News:
Our summer harvest :
Universal bound on microwave dissipation in superconducting circuits
Thibault Charpentier, Anton Khvalyuk, Lev Ioffe, Mikhail Feigel’man, Nicolas Roch and Benjamin Sacépé
Science Advances Vol 12, Issue 35 – Published 26 Aug 2026
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Optimal absorption and emission of itinerant fields into a spin-ensemble memory
Linda Greggio, Tristan Lorriaux, Alexandru Petrescu, Mazyar Mirrahimi, and Audrey Bienfait
Phys. Rev. A 114, 022615 – Published 14 August, 2026
https://doi.org/10.1103/6xjr-tflh
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Suppression of Measurement-Induced State Transitions in cosο»Ώπ-Coupling Transmon Readout
Cyril Mori, Francesca D’Esposito, Alexandru Petrescu, Lucas Ruela, Shelender Kumar, Vishnu Narayanan Suresh, Waël Ardati, Dorian Nicolas, Giulio Cappelli et al.
PRX Quantum 7, 020369 – Published 25 June, 2026
https://doi.org/10.1103/ylsw-t92p
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Coherence limits in interference-based cos(2π) qubits
S. Messelot, A. Leblanc, J. -S. Tettekpoe, F. Lefloch, Q. Ficheux, J. Renard, and É. Dumur
Phys. Rev. Applied - Accepted 10 June, 2026
Superconducting circuit enabling the manipulation of a Schrödinger cat qubit
@N.Hoppenot/ENS Lyon
ABOUT
The RobustSuperQ project aims at accelerating French R&D on superconducting and hybrid qubits protected by construction against decoherence. It is part of a post-transmon strategy, alternative to surface code, in which the French teams are at the forefront. It brings together all of these teams around three complementary concepts: the Cat-code architecture, spin qubits implanted on superconducting circuits, and topologically protected superconducting qubits.
RobustSuperQ is a target project of the PEPR Quantum Technologies (priority programme for research & equipment),
part of the French National Quantum Strategy
WHAT WE DO
Assembling a superconducting circuit in cavity
@N.Hoppenot/ENS Lyon
We accelerate the French R&D on robust superconducting and hybrid qubits protected against decoherence. The project is organized into work packages (WP)
- WP0: Bricks of components and methods for WP1, 2 and 3.
- WP1: Cat-qubits encoding information in quantum superpositions of coherent microwave states.
- WP2: Dopant Spin qubits, encoding information in electronic and nuclear spins.
- WP3: Development of new qubits with topological protection.
- WP4: Creation and modernization of two manufacturing platforms* for superconducting qubits, and project coordination.
*Platforms: The two technical poles in the field, Ile-de-France and Grenoble, will make a qualitative leap in terms of resources, via the creation at CEA-Université Paris-Saclay of a new dedicated platform, and the acquisition of fabrication and characterization tools in the two poles. The resources will be pooled and interoperable, and the synergy of know-how and associated processes will be maximized.