Strong environmental coupling in a Josephson parametric amplifier
By J. Mutus, T. White, R. Barends, Yu Chen, Zijun Chen, B. Chiaro, A. Dunsworth, Evan Jeffrey, J. Kelly, A. Megrant and 9 more. 2014
183 citations recorded by the source corpus.
We present a lumped-element Josephson parametric amplifier designed to operate with strong coupling to the environment. In this regime, we observe broadband frequency dependent amplification with multi-peaked gain profiles. We account for this behavior using the “pumpistor” model which allows for frequency dependent variation of the external impedance. Using this understanding, we demonstrate control over the complexity of gain profiles through added variation in the environment impedance at a given frequency. With strong coupling to a suitable external impedance, we observe a significant increase in dynamic range, and large amplification bandwidth up to 700 MHz giving near quantum-limited performance.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/55b8ae8816483198558fc0ae46db0599740ff9a5
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
In Electrical and Electronic Engineering
Citations in the corpus
- Superconducting Parametric Amplifiers: The State of the Art in Josephson Parametric Amplifiers (2020, background): “[41] in the context of varactor-based circuits, and there have been recent efforts to place similar design reasoning in a modern JJ circuit context [34], [42], [43].”