Related papers: A Traveling Wave Parametric Amplifier Isolator

A Traveling Wave Parametric Amplifier Isolator

URL: http://arxiv.org/abs/2406.19752v1
Date: Fri, 28 Jun 2024 08:51:22 GMT
Title: A Traveling Wave Parametric Amplifier Isolator
Authors: Arpit Ranadive, Bekim Fazliji, Gwenael Le Gal, Giulio Cappelli, Guilliam Butseraen, Edgar Bonet, Eric Eyraud, Sina Böhling, Luca Planat, A. Metelmann, Nicolas Roch,
Abstract summary: Built-in isolation, as well as gain, would address their primary limitation: lack of true directionality. We demonstrate a Josephson-junction-based traveling-wave parametric amplifier isolator.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Superconducting traveling-wave parametric amplifiers have emerged as highly promising devices for near-quantum-limited broadband amplification of microwave signals and are essential for high quantum-efficiency microwave readout lines. Built-in isolation, as well as gain, would address their primary limitation: lack of true directionality due to potential backward travel of electromagnetic radiation to their input port. Here, we demonstrate a Josephson-junction-based traveling-wave parametric amplifier isolator. It utilizes third-order nonlinearity for amplification and second-order nonlinearity for frequency upconversion of backward propagating modes to provide reverse isolation. These parametric processes, enhanced by a novel phase matching mechanism, exhibit gain of up to 20~dB and reverse isolation of up to 30~dB over a static 3~dB bandwidth greater than 500~MHz, while keeping near-quantum limited added noise. This demonstration of a broadband truly directional amplifier ultimately paves the way towards broadband quantum-limited microwave amplification lines without bulky magnetic isolators and with inhibited back-action.

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