Quantum Computing Control System

In 2018, Zurich Instruments introduced the first commercial Quantum Computing Control System (QCCS), designed to control more than 100 superconducting and spin qubits. Each component of the QCCS is conceived to play a specific role in qubit control, readout and feedback, and operates in a fully synchronized manner with the other parts of the system. LabOne Q, the Zurich Instruments control software for the QCCS, provides a full measurement framework for quantum computing and facilitates the integration into higher-level software.

The Zurich Instruments QCCS supports researchers and engineers by allowing them to focus on the development of quantum processors and other elements of the quantum stack while benefiting from the most advanced classical control electronics and software.

Efficient workflows, tailored specifications and feature sets, and a high degree of reliability are the characteristics most valued by our customers.

The scientific achievements accomplished with the QCCS (see below for a list of publications) are a testimony to our close engagement with some of the most ambitious research groups in this area. The QCCS operates directly at qubit frequencies without mixer calibration, offers high density and low cost per qubit, and provides a growing feature set that takes into account the most recent developments in quantum computing.

Key Features

Scalable design: new inputs and outputs can be added at any time, and a high channel density and consistent performance are guaranteed for all setup sizes.
Productivity-boosting software: LabOne Q efficiently connects high-level quantum algorithms with the analog signals at the quantum device.
Hardware specifications that match the application: low noise, high resolution, and large bandwidth.
A thought-through and tested systems approach: precise synchronization, reliable operation.
Feedback operation: fast data propagation across the system, powerful decoding capability.

System Control

Operation as a single instrument
Synchronization and real-time operation across the entire system
Parallelization and queuing of tasks to minimize idle time on the quantum device
Interfaces to other quantum frameworks

Qubit Control

Access to maximum gate fidelity: low noise, high bandwidth, high stability
Solutions for all typical single- and two-qubit control signals
High system usage thanks to memory-efficient sequencing

Qubit Readout

Up to 64 qubits per instrument
Maximum readout fidelity
Low-latency, real-time operation
Analysis of qutrits and ququads with multi-state discrimination

Quantum Feedback

Multiple supported configurations: from single-qubit to large-scale quantum computing
Ultra-low latency down to 50 ns
Powerful multi-qubit state decoder

QCCS Overview Video

QCCS Quantum Computing Control System

Zurich Instruments - Qubit control for 100 qubits and more

Case Study

In April 2020, Quantum Inspire went live. As the first European quantum computer in the cloud, it provides access to 2 backends, one with superconducting transmon qubits and one with spin qubits. Both setups are powered by the Zurich Instruments QCCS.

Watch the 'Making of' video

Reliable, stable operation 24/7
Performance-critical features: multiplexed readout, precompensation and interfacing
Full feature set: bring-up, calibration and characterization, no manual re-cabling
Upgrade path to 100 qubits and beyond

Application Notes

Zurich Instruments

Superconducting Qubit Characterization

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Zurich Instruments

Active Reset of Superconducting Qubits

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Zurich Instruments

Frequency Up-Conversion for Arbitrary Waveform Generators

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Zurich Instruments

Bell State Preparation of Superconducting Qubits

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Publications

Bengtsson, A. et al.

Improved success probability with greater circuit depth for the quantum approximate optimization algorithm

Phys. Rev. Applied 14, 034010 (2020)

DOI: 10.1103/PhysRevApplied.14.034010

Andersen, C.K. et al.

Repeated Quantum Error Detection in a Surface Code

Nat. Phys. (2020)

DOI: 10.1038/s41567-020-0920-y

Rol, M.A. et al.

Fast, high-fidelity conditional-phase gate exploiting leakage interference in weakly anharmonic superconducting qubits

Phys. Rev. Lett. 123, 120502 (2019)

DOI: 10.1103/PhysRevLett.123.120502

Vukušić, L. et al.

Single-Shot Readout of Hole Spins in Ge

Nano Lett. 18, 7141-7145 (2018)

DOI: 10.1021/acs.nanolett.8b03217

Werninghaus, M. et al.

Leakage reduction in fast superconducting qubit gates via optimal control

arXiv:2003.05952

Crippa, A. et al.

Gate-reflectometry dispersive readout and coherent control of a spin qubit in silicon

Nat. Commun. 10, 2776 (2019)

DOI: 10.1038/s41467-019-10848-z

Rol, M.A. et al.

A fast, low-leakage, high-fidelity two-qubit gate for a programmable superconducting quantum computer

Phys. Rev. Lett. 123, 120502 (2019)

DOI: 10.1103/PhysRevLett.123.120502

Bultink, C.C. et al.

General method for extracting the quantum efficiency of dispersive qubit readout in circuit QED

Appl. Phys. Lett. 112, 092601 (2018)

DOI: 10.1063/1.5015954

Heinsoo, J. et al.

Rapid High-fidelity Multiplexed Readout of Superconducting Qubits

Phys. Rev. Applied 10, 034040 (2018)

DOI: 10.1103/PhysRevApplied.10.034040

Andersen, C.K. et al.

Entanglement stabilization using ancilla-based parity detection and real-time feedback in superconducting circuits

npj Quantum Inf. 5, 69 (2019)

DOI: 10.1038/s41534-019-0185-4

Collodo, M.C. et al.

Implementation of conditional phase gates based on tunable ZZ interactions

Phys. Rev. Lett. 125, 240502 (2020)

DOI: 10.1103/PhysRevLett.125.240502

Guo, X.-Y. et al.

Observation of Bloch oscillations and Wannier-Stark localization on a superconducting processor

npj Quantum Inf. 7, 51 (2021)

DOI: 10.1038/s41534-021-00385-3

Zwerver, A.M.J. et al.

Qubits made by advanced semiconductor manufacturing

Nature Electronics 5, 184–190 (2022)

https://www.nature.com/articles/s41928-022-00727-9

Marques, J.F. et al.

Logical-qubit operations in an error-detecting surface code

arXiv

arXiv:2102.13071

Donati, G.

A look at the full stack

Nat. Rev. Phys. 3, 226–228 (2021)

DOI: 10.1038/s42254-021-00301-w

Quantum Computing Control System

Key Features

System Control

System Control

Qubit Control

Qubit Control

Qubit Readout

Qubit Readout

Quantum Feedback

Quantum Feedback

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QCCS Overview Video

Case Study

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Application Notes

Superconducting Qubit Characterization

Active Reset of Superconducting Qubits

Frequency Up-Conversion for Arbitrary Waveform Generators

Bell State Preparation of Superconducting Qubits

Publications

Improved success probability with greater circuit depth for the quantum approximate optimization algorithm

Repeated Quantum Error Detection in a Surface Code

Fast, high-fidelity conditional-phase gate exploiting leakage interference in weakly anharmonic superconducting qubits

Single-Shot Readout of Hole Spins in Ge

Leakage reduction in fast superconducting qubit gates via optimal control

Gate-reflectometry dispersive readout and coherent control of a spin qubit in silicon

A fast, low-leakage, high-fidelity two-qubit gate for a programmable superconducting quantum computer

General method for extracting the quantum efficiency of dispersive qubit readout in circuit QED

Rapid High-fidelity Multiplexed Readout of Superconducting Qubits

Entanglement stabilization using ancilla-based parity detection and real-time feedback in superconducting circuits

Implementation of conditional phase gates based on tunable ZZ interactions

Observation of Bloch oscillations and Wannier-Stark localization on a superconducting processor

Qubits made by advanced semiconductor manufacturing

Logical-qubit operations in an error-detecting surface code

A look at the full stack