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Johannes Fink

Johannes Fink

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Johannes Fink is professor at the Institute of Science and Technology Austria (ISTA). He co-led the Hybrid Semiconductor—Superconductor Quantum Devices project and is currently co-leading the Protected States of Quantum Matter project.

Born in Austria, Fink studied physics at the University of Vienna. At ETH Zurich (Switzerland) he conducted a PhD in the field of circuit quantum electrodynamics for which he was awarded the ETH Medal in 2010. After a postdoc at ETH he became IQIM postdoctoral scholar and a senior staff scientist in the Department of Applied Physics at the California Institute of Technology. In January 2016 he started the Quantum Integrated Devices laboratory at ISTA. Fink is the recipient of numerous other awards and prizes, including the CSF Award (2009), an IQIM fellowship (2012), an ERC starting grant (2017) and the Fritz Kohlrausch award (2018).

Fink’s research is positioned at the intersection of quantum optics and mesoscopic condensed matter physics. He studies quantum coherent effects in electrical, mechanical and optical chip-based devices with the goal of advancing and integrating quantum technology for simulation, communication, sensing and metrology. During his PhD at ETH Zurich he observed the geometric phase and studied fundamental interactions between light and matter in superconducting electrical circuits. As a postdoc at Caltech he developed a new electro-mechanics platform and demonstrated motional ground state cooling of a dielectric nanobeam. At ISTA he used mechanical motion to realize an on-chip microwave circulator, for which he was awarded the physics prize of the Austrian Physical Society, and to deterministically generate and distribute entangled microwave radiation.

Johannes Fink | Awards Film

Johannes Fink | Insights Film

Johannes Fink's News

NOMIS scientist Johannes Fink has received the Fritz Kohlrausch Award of the Austrian Physical Society (Fritz Kohlrausch Preis der Österreichischen Physikalischen Gesellschaft, ÖPG). APA-Science reported on the award in the […]

NOMIS scientist Johannes Fink has received the Fritz Kohlrausch Award of the Austrian Physical Society (Fritz Kohlrausch Preis der Österreichischen Physikalischen Gesellschaft, ÖPG). APA-Science reported on the award in the […]

Johannes Fink's Insights

Abstract: State-of-the-art transmon qubits rely on large capacitors, which systematically improve their coherence due to reduced surface-loss participation. However, this approach increases both the footprint and the parasitic cross-coupling and is ultimately limited by radiation losses - a potential roadblock for scaling up quantum processors to millions of qubits. In this
Abstract: Currently available quantum processors are dominated by noise, which severely limits their applicability and motivates the search for new physical qubit encodings. In this work, we introduce the inductively shunted transmon, a weakly flux-tunable superconducting qubit that offers charge offset protection for all levels and a 20-fold reduction in flux