Toshiba’s Double-Transmon Coupler Will Realize Faster, More Accurate Superconducting Quantum Computers

Rhea-AI Summary

Toshiba Corporation has achieved a significant breakthrough in quantum computing with the development of a double-transmon coupler, enhancing speed and accuracy in quantum computation. This technology allows qubits to be completely coupled or uncoupled, improving processing times to 24 ns with a 99.99% accuracy in two-qubit gates. The advances support higher-performance quantum computers, aiding in goals like carbon neutrality and drug development. Details were published on September 15 in Physical Review Applied.

Positive

• The double-transmon coupler improves quantum computation speed and accuracy.
• Achieves two-qubit gate accuracy of 99.99% with a processing time of only 24 ns.
• Enables complete coupling and uncoupling, minimizing crosstalk errors.

Negative

• None.

Paving the way for the realization of high-performance quantum computers that will contribute to solving various social issues

TOKYO--(BUSINESS WIRE)-- Researchers at Toshiba Corporation (TOKYO: 6502) have achieved a breakthrough in quantum computer architecture: the basic design for a double-transmon coupler that will improve the speed and accuracy of quantum computation in tunable couplers. The coupler is a key device in determining the performance of superconducting quantum computers.

Conceptual diagram of a superconducting quantum computer (Graphic: Business Wire)

Tunable couplers in a superconducting quantum computer link two qubits and perform quantum computations by turning on and off the coupling between them. Current technology can turn off the coupling of transmon qubits with close frequencies, but this is prone to crosstalk errors that occur on one of the qubits when the other qubit is irradiated with electromagnetic waves for control. In addition, current technology cannot completely turn off coupling for qubits with significantly different frequencies, resulting in errors due to residual coupling.

Toshiba has recently devised a double-transmon coupler that can completely turn on and off the coupling between qubits with significantly different frequencies. Completely turning on enables high-speed quantum computations with strong coupling, while completely turning off eliminates residual coupling, which improves quantum computation speeds and accuracy. Simulations with the new technology have shown it realizes two-qubit gates, basic operations in quantum computation, with an accuracy of 99.99% and a processing time of only 24 ns.

Toshiba’s double-transmon coupler can be applied to fixed-frequency transmon qubits, realizing high stability and ease of design. It is the first to realize coupling between fixed-frequency transmon qubits with significantly different frequencies that can be completely switched on and off, and to deliver a high-speed, accurate two-qubit gate.

The technology is expected to advance the realization of higher-performance quantum computers that will contribute in such areas as the achievement of carbon neutrality and the development of new drugs. Details of the technology were published in the United States on September 15 in the Physical Review Applied, a journal of the American Physical Society (https://doi.org/10.1103/PhysRevApplied.18.034038).

The full release: https://www.global.toshiba/ww/technology/corporate/rdc/rd/topics/22/2209-01.html

About Toshiba

Toshiba Corporation leads a global group of companies that combines knowledge and capabilities from over 140 years of experience in a wide range of businesses—from energy and social infrastructure to electronic devices—with world-class capabilities in information processing, digital and AI technologies. These distinctive strengths support Toshiba’s continued evolution toward becoming an Infrastructure Services Company that promotes data utilization and digitization, and one of the world’s leading cyber-physical-systems technology companies. Guided by the Basic Commitment of the Toshiba Group, “Committed to People, Committed to the Future,” Toshiba contributes to society’s positive development with services and solutions that lead to a better world. The Group and its 120,000 employees worldwide secured annual sales of 3.3 trillion yen (US$27.4 billion) in fiscal year 2021.
Find out more about Toshiba at www.global.toshiba/ww/outline/corporate.html

View source version on businesswire.com: https://www.businesswire.com/news/home/20220913006341/en/

Toshiba Corporation

Corporate Communications Div.

Tatsuro Oishi / Naoko Oura

media.relations@toshiba.co.jp

Source: Toshiba Corporation

FAQ

What is Toshiba's recent advancement in quantum computing?

Toshiba has developed a double-transmon coupler that enhances the speed and accuracy of quantum computations.

What accuracy does Toshiba's double-transmon coupler achieve?

The technology allows for a two-qubit gate accuracy of 99.99%.

When was Toshiba's quantum computing technology published?

Details were published on September 15 in Physical Review Applied.

How fast can Toshiba's new technology perform quantum computations?

It can perform two-qubit gates with a processing time of only 24 ns.

What are the potential applications of Toshiba's quantum computing advancements?

The technology could contribute to achieving carbon neutrality and the development of new drugs.