Related papers: Tunable and nonlinearity-enhanced dispersive-plus-dissipative coupling in photon-pressure circuits

Tunable and nonlinearity-enhanced dispersive-plus-dissipative coupling in photon-pressure circuits

URL: http://arxiv.org/abs/2511.22571v1
Date: Thu, 27 Nov 2025 16:02:04 GMT
Title: Tunable and nonlinearity-enhanced dispersive-plus-dissipative coupling in photon-pressure circuits
Authors: Mohamad Kazouini, Janis Peter, Zisu Emily Guo, Benedikt Wilde, Kevin Uhl, Dieter Koelle, Reinhold Kleiner, Daniel Bothner,
Abstract summary: A GHz circuit interacts with a MHz circuit via a magnetic-flux-tunable combination of dispersive and dissipative photon-pressure.<n>We demonstrate that interference of the two interaction paths leads to a Fano-like response in photon-pressure induced transparency.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Photon-pressure circuits are the circuit implementation of the cavity optomechanical Hamiltonian and discussed for qubit readout, low-frequency quantum photonics and dark matter axion detection. Due to the enormous design flexibility of superconducting circuits, photon-pressure systems provide fascinating possibilities to explore unusual parameter regimes of the optomechanical Hamiltonian. Here, we report the realization of a photon-pressure platform, in which a GHz circuit interacts with a MHz circuit via a magnetic-flux-tunable combination of dispersive and dissipative photon-pressure. In addition, both coupling rates are considerably enhanced by nonlinearities of the GHz-mode, which leads to the multi-photon coupling rates scaling stronger with the pump photon number $n_\mathrm{c}$ than the usual $\sqrt{n_\mathrm{c}}$ dependence. We demonstrate that interference of the two interaction paths leads to a Fano-like response in photon-pressure induced transparency, and that the dynamical backaction is considerably modified compared to the dispersive case, including a parametric instability caused by a red-detuned pump tone.

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