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Fink Group

Quantum Integrated Devices

The Fink group’s research is positioned between quantum optics and mesoscopic condensed matter physics. The team studies quantum physics in electrical, mechanical, and optical chip-based devices with the goal to advance and integrate quantum technology for simulation, communication, metrology, and sensing.

One of Fink’s goals is to develop a microchip-based router that will be able to convert a microwave signal to an optical signal with near unity efficiency. With such devices, the Fink group seeks to perform quantum communication with superconducting circuits and telecom wavelength photons. In one project, the group uses a qubit to create a single photon state. With the router, this microwave photon is converted into an optical photon, which can then be transmitted over long distances using low-loss optical fiber. The Fink group will also use this technique to entangle microwave and optical photons – an important step toward realizing worldwide quantum networks. Another direction is to develop higher quality qubits by using new electrical circuit elements called geometric superinductors which help suppress charge fluctuations that can wash out the quantum information stored on-chip.

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Current Projects

Quantum electro- and optomechanics | Quantum microwave photonics | Ultra-high impedance physics for hardware protected qubits | Multi-qubit quantum electrodynamics | Resonant nonlinear optics 


Agustí J, Minoguchi Y, Fink JM, Rabl P. 2022. Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. Physical Review A. 105(6), 062454. View

Sigillito AJ, Covey JP, Fink JM, Petersson K, Preble S. 2022. Emerging qubit systems: Guest editorial. Applied Physics Letters. 120(19), 190401. View

Qiu L, Huang G, Shomroni I, Pan J, Seidler P, Kippenberg TJ. 2022. Dissipative quantum feedback in measurements using a parametrically coupled microcavity. PRX Quantum. 3(2), 020309. View

Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. 2022. Quantum-enabled operation of a microwave-optical interface. Nature Communications. 13, 1276. View

Krause J, Dickel C, Vaal E, Vielmetter M, Feng J, Bounds R, Catelani G, Fink JM, Ando Y. 2022. Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T. Physical Review Applied. 17(3), 034032. View

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ReX-Link: Johannes Fink


since 2021 Professor, Institute of Science and Technology Austria (ISTA)
2016 – 2021 Assistant Professor, Institute of Science and Technology Austria (ISTA)
2015 – 2016 Senior Staff Scientist, California Institute of Technology, Pasadena, USA
2012 – 2015 IQIM Postdoctoral Research Scholar, California Institute of Technology, Pasadena, USA
2011 – 2012 Postdoctoral Research Fellow, ETH Zurich, Switzerland
2010 PhD, ETH Zurich, Switzerland

Selected Distinctions

2018 Fritz Kohlrausch Award
2017 ERC Starting Grant
2012 IQIM Postdoctoral Prize Fellowship
2010 ETH Medal for Outstanding Dissertation
2009 CSF Award at the QSIT Conference on Quantum Engineering

Additional Information

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Physics & Beyond at ISTA

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