Spin-Qubit Characterization and Modeling
Compact Quantum Dot Models for Analog Microwave co-Simulation
10:48 am – 11:00 amModelling the quantum-classical electrical interface of quantum systems is of paramount importance to design scalable quantum devices embedded in electrical circuits, and it is at the heart of the simulation, control, and readout of modern quantum computing systems. In this work we present Verilog-A compact models of quantum-dot-based quantum systems, capable of faithfully reproducing coherent quantum behavior within a standard mixed-signal electronic simulator, allowing form compromise-free co-simulation of quantum devices. We present results from simulations performed in Cadence Spectre®, an industry-standard commercial simulator, showcasing quantum phenomena such as Rabi oscillations and Landau-Zener-Stückelberg-Majorana interference, and we demonstrate vacuum Rabi splitting caused by coupling a qubit with an RLC resonator. Moreover, we explore the use of the developed simulation software in the design quantum-dot-based analog circuits and present an implementation of a frequency multiplier leveraging the nonlinear properties of quantum dots. Our work paves the way for a new paradigm of designing quantum devices, which leverages the power of computer-aided design and automation. Our faithful reproduction of quantum effects allows for in silico testing and optimization quantum processing units, as well as control and readout schemes, pulses and circuitry, overall allowing quantum technologies to leverage the many decades of tools and innovations responsible for the unrivaled scaling and integration of classical electronics.