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Related Experiment Video

Updated: Jun 21, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A cryogenic on-chip microwave pulse generator for large-scale superconducting quantum computing.

Zenghui Bao¹, Yan Li¹, Zhiling Wang¹

¹Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing, PR China.

Nature Communications

|July 15, 2024

Summary

This summary is machine-generated.

Researchers developed a cryogenic microwave pulse generator for superconducting quantum computers. This innovation enables high-fidelity qubit readout and is crucial for scaling quantum processors by reducing heat load and cost.

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Area of Science:

Quantum Computing
Cryogenic Engineering
Microwave Engineering

Background:

Superconducting quantum processors require microwave signals delivered from room-temperature electronics to cryogenic environments.
Current architectures face limitations in heat load and electronics cost, hindering scalability for fault-tolerant quantum computing.

Purpose of the Study:

To develop a coherent cryogenic microwave pulse generator compatible with superconducting quantum circuits.
To enable monolithic integration of control electronics and qubits for large-scale quantum computers.

Main Methods:

Designed a novel signal source driven by digital-like signals.
Integrated the pulse generator directly at millikelvin temperatures.
Utilized the generator for high-fidelity readout of superconducting qubits.

Main Results:

Generated pulsed microwave emission with controlled phase, intensity, and frequency at millikelvin temperatures.
Demonstrated high-fidelity qubit readout using the cryogenic pulse generator.
The device features a small footprint and negligible heat load.

Conclusions:

The developed cryogenic microwave pulse generator is a key enabling technology for large-scale superconducting quantum computers.
This innovation addresses the limitations of current architectures, paving the way for fault-tolerant quantum computing.
The device offers flexibility and compatibility with existing superconducting quantum circuits.