Current detection using a Josephson parametric upconverter

Abstract

We present the design, measurement and analysis of a current sensor based on a process of Josephson parametric upconversion in a superconducting microwave cavity. Terminating a coplanar waveguide with a nanobridge constriction Josephson junction, we observe modulation sidebands from the cavity that enable highly sensitive, frequency-multiplexed output of small currents for applications such as transition-edge sensor array readout. We derive an analytical model to reproduce the measurements over a wide range of bias currents, detunings and input powers. Tuning the frequency of the cavity by more than \SI{100}{\mega\hertz} with DC current, our device achieves a minimum current sensitivity of \SI{8.9}{\pico\ampere\per\sqrt{\hertz}}. Extrapolating the results of our analytical model, we predict an improved device based on our platform, capable of achieving sensitivities down to \SI{50}{\femto\ampere\per\sqrt{\hertz}}}, or even lower if one could take advantage of parametric amplification in the Josephson cavity. Taking advantage of the Josephson architecture, our approach can provide higher sensitivity than kinetic inductance designs, and potentially enables detection of currents ultimately limited by quantum noise.

References in corpus (19)

• Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box
• Black-box superconducting circuit quantization
• Introduction to Quantum Electromagnetic Circuits
• Tunable superconducting nanoinductors
• Controlling the dynamic range of a Josephson parametric amplifier
• Fast charge sensing of a cavity-coupled double quantum dot using a Josephson parametric amplifier
• Novel E-beam lithography technique for in-situ junction fabrication: the controlled undercut
• Frequency-tunable Superconducting Resonators via Nonlinear Kinetic Inductance
• A ballistic graphene superconducting microwave circuit
• Coupling microwave photons to a mechanical resonator using quantum interference
• Understanding the saturation power of Josephson Parametric Amplifiers made from SQUIDs arrays
• Optimizing Anharmonicity in Nanoscale Weak Link Josephson Junction Oscillators
• Hysteresis in superconducting short weak links and $\mu$-SQUIDs
• Flux-driven Josephson parametric amplifiers: Hysteretic flux response and nondegenerate gain measurements
• Tunable Nb superconducting resonators based upon a Ne-FIB-fabricated constriction nanoSQUID
• QuCAT: Quantum Circuit Analyzer Tool in Python
• Reversibility of Superconducting Nb Weak Links Driven by the Proximity Effect in a Quantum Interference Device
• Dielectric losses in multi-layer Josephson junction qubits
• Broadband architecture for galvanically accessible superconducting microwave resonators

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