Compact quantum dot models for analog microwave co-simulation.

Area of Science:

• Quantum Computing Hardware
• Semiconductor Device Modeling
• Electronic Design Automation (EDA)

Background:

• Scalable solid-state quantum computers necessitate seamless integration with classical electronics.
• Efficient simulation of the quantum-classical electronic interface is critical for developing hybrid quantum systems.
• Existing simulation tools often lack the capability to accurately model quantum phenomena alongside classical circuits.

Purpose of the Study:

• To develop Verilog-A compact models for simulating quantum-dot-based systems.
• To enable faithful reproduction of coherent quantum behavior and decoherence effects in standard electronic circuit simulators.
• To facilitate compromise-free co-simulation of hybrid quantum devices.

Main Methods:

• Development of Verilog-A compact models tailored for quantum-dot systems.
• Integration of these models into industry-standard electronic circuit simulators (e.g., Cadence Spectre®).
• Co-simulation of circuits containing both quantum and classical components to observe quantum phenomena.

Main Results:

• Successful demonstration of Verilog-A models accurately capturing coherent quantum behavior and decoherence.
• Validation of co-simulation capabilities in Cadence Spectre®, showcasing quantum phenomena in hybrid circuits.
• Proof of concept for simulating quantum processing units and quantum-classical interfaces using established EDA tools.

Conclusions:

• The developed Verilog-A models enable accurate simulation of quantum-classical interfaces for quantum computing.
• This approach allows leveraging decades of semiconductor EDA development for quantum system design and optimization.
• Paves the way for a new paradigm in designing hybrid quantum-analog circuits and quantum processing units.