Electromagnetic Simulation and Microwave Circuit Approach of Heat Transport in Superconducting Qubits

TL;DR

This paper uses electromagnetic simulations to analyze heat transport in superconducting qubits, aiding the design of quantum circuits by predicting heat flow and parasitic effects.

Contribution

It introduces a numerical simulation approach combining electromagnetic modeling with microwave circuit theory for studying quantum heat transport.

Findings

Electromagnetic simulations effectively predict photonic heat transport.

The method identifies parasitic resonances in qubit-resonator devices.

Simulation results align with microwave circuit theory predictions.

Abstract

The study of quantum heat transport in superconducting circuits is significant for further understanding the connection between quantum mechanics and thermodynamics, and for possible applications for quantum information. The first experimental realisations of devices demonstrating photonic heat transport mediated by a qubit have already been designed and measured. Motivated by the analysis of such experimental results, and for future experimental designs, we numerically evaluate the photonic heat transport of qubit-resonator devices in the linear circuit regime through electromagnetic simulations using Sonnet software, and compare with microwave circuit theory. We show that the method is a powerful tool to calculate heat transport and predict unwanted parasitic resonances and background.