Exploration of superconducting multi-mode cavity architectures for quantum computing

TL;DR

This paper explores the design and optimization of multi-cell superconducting RF cavities for quantum computing, aiming to enhance computational capabilities by leveraging multimode architectures with high coherence.

Contribution

It introduces a parametric electromagnetic simulation-based design process for multi-cell SRF cavities tailored for quantum computation, adapting particle accelerator technology for quantum hardware.

Findings

Optimized multi-cell SRF cavity designs with improved electromagnetic properties.

Analysis of transmon-cavity interactions for quantum information processing.

Blueprint for future multimode superconducting cavity development.

Abstract

Superconducting radio-frequency (SRF) cavities coupled to transmon circuits have proven to be a promising platform for building high-coherence quantum information processors. An essential aspect of this realization involves designing high quality factor three-dimensional superconducting cavities to extend the lifetime of quantum systems. To increase the computational capability of this architecture, we are exploring a multimode approach. This paper presents the design optimization process of a multi-cell SRF cavity to perform quantum computation based on an existing design developed in the scope of particle accelerator technology. We perform parametric electromagnetic simulations to evaluate and optimize the design. In particular, we focus on the analysis of the interaction between a nonlinear superconducting circuit known as the transmon and the cavity. This parametric design optimization is structured to serve as a blueprint for future studies on similar systems.