SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 58: Poster: Superconductivity II
TT 58.18: Poster
Donnerstag, 30. März 2023, 15:00–18:00, P2/OG3
Towards dissipatively coupled photon-pressure circuits — •Janis Peter, Mohamad Adnan el Kazouini, Emily Guo, Kevin Uhl, and Daniel Bothner — Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen, Germany
Photon-pressure circuits are a superconducting all-circuit equivalent of cavity optomechanics. They recently gained a lot of attention since they are providing a new toolbox for sensing and controlling radiofrequency (rf) photons by high-frequency (hf) circuits. In contrast to optomechanical systems, this platform only consists of LC circuits without any mechanical resonators. As a result they offer a larger flexibility regarding device parameters and a simplified fabrication process. Until now, photon-pressure circuits have been realized using the so-called dispersive interaction: the rf-resonator modulates the resonance frequency ω0 of the hf-circuit. To reach the quantum regime by ground state cooling, dispersively coupled devices need to be in the so-called sideband-resolved regime, that is, the resonance frequency Ω0 of the rf-resonator is much larger than the decay rate of the hf-circuit κ (typically several 100 kHz). Extending the quantum regime to even lower frequency photons ( 1 MHz) requires a different interaction: dissipative photon-pressure coupling, where κ is modulated instead of ω0. We present our progress on implementing a dissipative photonpressure interaction between two superconducting circuits and discuss in this context simulation, fabrication, device design and intermediate experimental milestones.