RobustSuperQ Days 2026

On Monday 30^th and Tuesday 31^st March 2026, members of the RobustSuperQ project of the PEPR Quantum gathered for the RobustSuperQ Days 2026. The fourth edition of this annual event was held at Mines Paris – PSL and welcomed over 80 participants.

Led by Nicolas Roch, a CNRS research director at the Néel Institute, and Denis Vion, a CEA researcher at the Service de physique de l’état condensé (SPEC), RobustSuperQ aims to accelerate French R&D into superconducting and hybrid qubits that are inherently protected against decoherence.

Monday 30^th March

WP0 ‘Component building blocks and methods’, aimed at developing the basic components and the processes and methods common to the various architectures of WP1, 2 and 3: Shorts

Introduction par François Lefloch, CEA researcher at Laboratoire PHotonique ELectronique et Ingénierie QuantiqueS (PHELIQS)

Superconducting components at CEA-Leti by Jean-Philippe Michel, CEA researcher at CEA-Leti

High kinetic inductance resonators in the perpendicular magnetic field by Benjamin Sacépé, CNRS research director at Institut Néel

High Qi Tantalum resonators by Olivier Buisson, CNRS research director at Institut Néel

WP2 ‘Dopant Spin qubits, encoding information in electronic and nuclear spins’ talks

Introduction by Patrice Bertet, CEA researcher at SPEC

Control and Readout of Single Nuclear Spins via Microwave Photon Counting by James O’Sullivan, CEA researcher at SPEC

Coupling spin defects to microwave circuits via acoustic resonators by Jérémie Viennot, CNRS researcher at Institut Néel

Optimal absorption and emission of itinerant fields into a spin ensemble by Audrey Bienfait, CNRS researcher at Laboratoire de Physique de l’ENS de Lyon (LPENSL)

WP1 ‘Cat-code Qubits’ talks

Présentation des tâches du WP1 by Zaki Leghtas, lecturer and researcher at Mines Paris at Laboratoire de Physique de l’ENS (LPENS)

Update of Alice&Bob work towards logical cat qubits by Ulysse Réglade, Quantum Experimentalist and Adrien Bocquet, physicist (Alice&Bob)

Progress on the parity measurement of cat states without two level systems by Armelle Celarier, PhD student at Alice&Bob

Multiphoton reservoir engineering using DC biased junctions par Ambroise Peugeot, ENS de Lyon researcher at LPENSL

Erika Borsje-Hekking, project manager de RobustSuperQ, Denis Vion, chercheur CEA au Service de physique de l'état condensé (SPEC) et co-coordinateur de RobustSuperQ. © PEPR Quantique
Patrice Bertet, chercheur CEA au SPEC. © PEPR Quantique
Audrey Bienfait, chercheuse CNRS au Laboratoire de Physique de l’ENS de Lyon (LPENSL). © PEPR Quantique
Zaki Leghtas, enseignant-chercheur Mines Paris au Laboratoire de Physique de l’ENS (LPENS). © PEPR Quantique
Ulysse Réglade, expérimentaliste quantique et Adrien Bocquet, physicien (Alice&Bob). © PEPR Quantique
Armelle Celarier, doctorante à Alice&Bob. © PEPR Quantique
Ambroise Peugeot, chercheur ENS de Lyon au LPENSL. © PEPR Quantique

Tuesday 31^stMarch

WP3 ‘Topologically protected qubits‘ workshop and talks

A quantized step toward 1D topological superconductivity by Silvano de Franceschi, CEA researcher at PHELIQS

Can we encode a GP qubit in a non-reciprocal circuit ? by Samuel Cailleaux, post-doc at LPENS, Quantic team

Kinetic inductance measurements of a carbon nanotube based Josephson junction by Maxime Hantute, PhD student at École Polytechnique at Laboratoire de physique de la matière condensée (LPMC)

Photoelectric detection of single microwave photons in a granular aluminium high-impedance quantum circuit by Julien Basset, lecturer and researcher at Université Paris-Saclay at Laboratoire de Physique des Solides (LPS)

The FerBo qubit by Hugues Pothier, CEA researcher at SPEC

Toward a Josephson Junction with a single helical state by Lucas Bugaud, CNRS engineer at LPS

Experimental realization of a cos 2 φ transmon qubit by Kyrylo Gerashchenko, post-doc at LPENS

Coherence limits in Interference-Based cos (2 φ) qubits par Jean-Samuel Tettekpoe, PhD student at DGA at l’Institut Néel

Silvano de Franceschi, chercheur CEA au PHELIQS. © PEPR Quantique
Samuel Cailleaux, post-doc au LPENS, équipe Quantic. © PEPR Quantique
Maxime Hantute, doctorant École Polytechnique au Laboratoire de physique de la matière condensée (LPMC). © PEPR Quantique
Julien Basset, enseignant-chercheur Université Paris-Saclay au Laboratoire de Physique des Solides (LPS). © PEPR Quantique
Hugues Pothier, chercheur CEA au SPEC. © PEPR Quantique
Lucas Bugaud, ingénieur CNRS au LPS. © PEPR Quantique
Kyrylo Gerashchenko, post-doc au LPENS. © PEPR Quantique
Jean-Samuel Tettekpoe, doctorant DGA à l’Institut Néel. © PEPR Quantique

Poster session

Probing the intrinsic losses of a graphene Josephson junction	Adán Castillo Guerrero
Soustractive & CMOS compatible fabrication of superconducting resonators and Josephson junctions	Antoine Trouche/Gwenael Le Gal
Inductances, RF filters & parametric amplifiers based on high-kinetic inductance superconductors	Maxime Lhote/Jean-Phillippe Michel
SMPD start-up project	Alexandre May / Léo Balembois
Superconducting Devices in Silicon	François Lefloch
Andreev-enhanced conductance quantization and gate-tunable induced superconducting gap in germanium	Elyjah Kiyooka
Towards non-local Josephson effects in CNT-based Andreev molecule	Angel Ibabe Aviles
Signatures of Andreev bound states in a carbon nanotube gatemon qubit	Hannes Riechert
Join the HF box initiative ! Safe HF operations for any researchers in academic settings	Patrick Abgrall
High fidelity and suppression of measurement-induced state transitions in transmon readout	Lucas Ruela
Non-Reciprocal Photonics in a Flux-Pumped Travelling Wave Josephson device	Taha Bouwakdh/Anthony Giraudo
Clean nanofabrication of carbon nanotube-van der Waals hybrid structures	Sugeiva Kisnapavan
Addressing…spins at the clock transitions with a frequency- and bandwidth-tunable superconducting resonator	Tristan Lorriaux