Publication
New QCT Group Paper on Superinductors and Ultrastrong Coupling
July 17, 2025
Quantum Computing Technologies Group“A new preprint by IFAE’s Quantum Computing and Technologies (QCT) group, titled “Superinductor-based ultrastrong coupling in a superconducting circuit” , has been uploaded to arXiv.
The study is authored by Alba Torras, Luca Cozzolino, Ariadna Gómez-del-Pulgar, Elia Bertoldo, and Pol Forn, and will soon be submitted for publication.
The paper presents the design and characterization of a flux qubit coupled to a superconducting resonator through a novel coupling element made of granular aluminium—a material distinct from the standard aluminium used in the circuit. This configuration enables operation in the ultrastrong coupling regime and is implemented in a fully in-house fabricated chip, developed at IFAE, CNM, and ICN2.
This is the first publication entirely led and executed by the QCT group at IFAE using chips fully produced locally. The work represents a key outcome of the European Quantera SiUCs project and forms the core of Alba Torras Coloma’s PhD thesis, which she will defend in November.
New device
New Dilution Refrigerator Installed at the QCT Lab
September 26, 2025
The Quantum Computing Technologies Lab at IFAE has just received its new dilution refrigerator from Leiden Cryogenics. The unit, customized with IFAE’s colors, is currently cooling down and is expected to reach 10 mK (0.01 K above absolute zero) tomorrow.
Network
IFAE joins EU‑selected SUPREME consortium to scale industrial production of superconducting quantum chips
July 11, 2025
The Institut de Física d’Altes Energies (IFAE) is one of the 23 partners from eight EU member states in SUPREME, a new European project selected under the Chips Joint Undertaking to establish pilot lines for the industrial production of superconducting quantum chips.