Compact Quantum Dot Models for Analog Microwave co-Simulation

TL;DR

This paper introduces Verilog-A compact models for quantum-dot systems that enable integrated co-simulation of quantum and classical circuits, facilitating the design of scalable quantum computing hardware.

Contribution

It presents the first compact Verilog-A models for quantum dots that accurately simulate quantum coherence within standard electronic circuit simulators.

Findings

Successful co-simulation of quantum and classical components in Cadence Spectre.

Faithful reproduction of coherent quantum phenomena in hybrid circuits.

Enabling quantum system design using existing electronic CAD tools.

Abstract

Scalable solid-state quantum computers will require integration with analog and digital electronics. Efficiently simulating the quantum-classical electronic interface is hence of paramount importance. Here, we present Verilog-A compact models with a focus on quantum-dot-based systems, relevant to semiconductor- and Majorana-based quantum computing. Our models are capable of faithfully reproducing coherent quantum behavior within a standard electronic circuit simulator, enabling compromise-free co-simulation of hybrid quantum devices. In particular, we present results from co-simulations performed in Cadence Spectre, showcasing coherent quantum phenomena in circuits with both quantum and classical components using an industry-standard electronic design and automation tool. Our work paves the way for a new paradigm in the design of quantum systems, which leverages the many decades of development of electronic computer-aided design and automation tools in the semiconductor industry to now simulate and optimize quantum processing units, quantum-classical interfaces, and hybrid quantum-analog circuits.