Design of Advanced Readout and System-on-Chip Analog Circuits for Quantum Chip

TL;DR

This paper presents a novel quantum readout system-on-chip design that integrates a Josephson Parametric Amplifier with a superconducting qubit chip, achieving efficient amplification and leakage suppression without traditional filtering components.

Contribution

It introduces a new integrated architecture that combines quantum-limited amplification with qubit protection, eliminating the need for Purcell filters in superconducting quantum systems.

Findings

Achieves 24 dB gain peaks and 0 dB gain troughs across C-band.

Enables qubit frequencies to align with gain minima, reducing leakage.

Demonstrates a compact, integrated quantum readout system.

Abstract

In this work, we design an advanced quantum readout architecture that integrates a four qubit superconducting chip with a novel parametric amplifier ended with analog front-end circuit. Unlike conventional approaches, this design eliminates the need for components such as Purcell filters. Instead, a Josephson Parametric Amplifier is engineered to simultaneously perform quantum-limited signal amplification and suppress qubit energy leakage. The design features a tailored gain profile across C-band, with sharp peaks (24 dB) and troughs (0 dB), enabling qubit frequencies to align with gain minima and resonator frequencies with gain maxima.