Superinductors for quantum information science

Project funded by Swedish Research Council (Project grant), grant 2013-04430_VR. Participating organisations named by the source: Chalmers University of Technology. Funded amount: SEK 3,700,000, as stated by the source. Runs 2014-01-01 to 2017-12-31. Keywords: Naturvetenskap, Natural Sciences, Fysik, Physical Sciences, Den kondenserade materiens fysik, Condensed Matter Physics. Source: OpenAIRE Graph, from the funder's project data (collected by OpenAIRE on 2025-12-05); national funding data, not CORDIS. Abstract given by the source: The most promising hardware modality for quantum information processing (QIP) is based on superconducting Josephson junctions (JJ). We have improved the performance of JJ-qubit devices tremendously during the last few years, but are not yet approaching the limit of what is feasible considering what we know about the JJs´ intrinsic losses. I will develop a new type of superconducting qubit - the "metastable flux qubit" - with extremely small couplings to its various noise sources, and therefore a projected much-improved energy-relaxation time. This would allow for tens of thousands of quantum-logic operations on the qubit. The realization of this device will greatly facilitate the progress towards QIP, and reduce the amount of resource overhead needed for quantum error correction during quantum computation on an entangled multi-qubit system. The novel component going into this qubit is a "superinductance," shunting the qubit´s non-linear JJ with an impedance greater than the quantum resistance (6.5 kohm). This is hard to achieve with ordinary, geometric (electromagnetic) inductors, whose impedance is always below that of free space (377 ohms), due to unavoidable shunt capacitance. Instead, I intend to use the huge kinetic inductance of superconducting thin-film nanowires. I will make these inductors by sputter deposition of Nb or NbN thin films, and then make metastable flux qubits, with the aim to build up a capability for multi-qubit experiments.

Original source.

Source: OpenAIRE Graph: projects of national funders, OpenAIRE, from the project data of Swedish Research Council. Retrieved 2026-10-28. Licence: Creative Commons Attribution 4.0 (OpenAIRE Graph). Selected metadata, adapted presentation; the publisher's record is authoritative. No endorsement by the source is implied. Licence: Creative Commons Attribution 4.0 (CC BY 4.0).

AI-assisted summary: The project "Superinductors for quantum information science" was funded by the Swedish Research Council with a grant of SEK 3,700,000, running from 2014 to 2017. It focuses on developing a new type of superconducting qubit to enhance quantum information processing. Suggested technology pillar: computing. Generated by AI from the public source text; it may contain errors and the original source is authoritative.