SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Superconducting Electronics

TT 39.1: Hauptvortrag

Mittwoch, 29. März 2023, 15:00–15:30, HSZ 304

Sensing and control of MHz photons with microwave photon-pressure — Ines C. Rodrigues^1,2, Gary A. Steele¹, and •Daniel Bothner^1,3 — ¹Kavli Institute of Nanoscience, Delft University of Technology, The Netherlands — ²Department of Physics, ETH Zürich, Switzerland — ³Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen, Germany

Superconducting microwave circuits have emerged as one of the leading platforms for quantum information science and quantum sensing in the recent decade. In 2018, a new type of interaction between a superconducting microwave circuit and a low frequency (LF) circuit has been realized, so called photon-pressure coupling, which is the all-circuit analogue of the radiation-pressure interaction between a mechanical oscillator and an optical cavity in optomechanics. Since 2020, several milestone experiments with photon-pressure circuits have been reported, such as the interferometric thermometry of an LF circuit, the observation of parametric strong-coupling or sideband-cooling of an LF mode into its quantum groundstate. Quite recently, we have realized a series of experiments in these circuits, for which we add a strong parametric drive to the Kerr-nonlinear high-frequency mode. This approach allows for parametrically enhanced interaction strengths, for the observation of nonreciprocal heat flow and for the implementation of photon-pressure with a "negative mass" microwave mode that inverts dynamical backaction and sideband-cooling effects. In our presentation, we will give an overview of photon-pressure circuits, discuss the most recent developments and possible future directions.