Toshiba’s Double-Transmon Coupler Will Realize Faster, More Accurate Superconducting Quantum Computers
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.
This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20220913006341/en/
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
To view this piece of content from cts.businesswire.com, please give your consent at the top of this page.
View source version on businesswire.com: https://www.businesswire.com/news/home/20220913006341/en/
Contact information
Toshiba Corporation
Corporate Communications Div.
Tatsuro Oishi / Naoko Oura
media.relations@toshiba.co.jp
About Business Wire
For more than 50 years, Business Wire has been the global leader in press release distribution and regulatory disclosure.
Subscribe to releases from Business Wire
Subscribe to all the latest releases from Business Wire by registering your e-mail address below. You can unsubscribe at any time.
Latest releases from Business Wire
Canva Unveils 2026 Design Trends: The Year of ‘Imperfect by Design’11.12.2025 00:52:00 EET | Press release
Canva, the world’s leading all-in-one visual communication platform, today unveiled its third annual Design Trends Report with bold predictions for creativity, social media and brand content in 2026. The company also unveiled a “Design DNA” feature, which offers Canva users a custom recap that celebrates their creative output in 2025. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20251210696597/en/ Canva Design DNA Trends from Creators, for Creators By analyzing design and search activity, expert insights from the Canva Designer Advisory Board, and a survey of 1,000 creators across the U.S. and Brazil, Canva has identified 10 design trends that will shape creative and design culture in 2026. The findings paint a clear picture: as creators embrace AI’s power, they also crave the human touches that make design feel personal. A New Creative Standard: Imperfect by Design As AI technology raises the baseline for what's possible, v
Audiencerate Achieves Google Customer Match Partner Status, strengthening its role as a Global Data Provider10.12.2025 23:40:00 EET | Press release
Audiencerate, an international technology company specializing in data activation solutions and platforms within the AdTech and MarTech sectors, has been officially awarded by Google as a Customer Match Upload Partner. This certification is granted to a restricted number of global operators (https://support.google.com/google-ads/answer/7361372?hl=en) authorized to manage and onboard first-party data into the Google Ads and DV360 ecosystem. The company strengthen its strategic partnership with Google by adding the Customer Match Upload Partner accreditation to its existing status as a certified Google Data Provider. This new credential enables Audiencerate to seamlessly integrate proprietary audience segments and data into Google’s advertising platforms. The combination of these two accreditations represents an exceptionalsituation in the international landscape and solidifies Audiencerate's position in the digital advertising market, which is increasingly reliant on first-party data. T
Defence, Security and Resilience Bank (DSRB) Development Group – Official Statement10.12.2025 22:06:00 EET | Press release
On 8 September 2025, the Defence, Security and Resilience Bank (DSRB) Development Group convened a high-level meeting in the City of London with representatives from 37 nations, including all G7 members, alongside the European Commission, NATO, European Parliament, Global Banks, and Ratings Agencies to discuss the DSRB. A number of countries have now indicated their intention to begin the formal steps required to bring the DSRB into existence. This phased pattern of engagement is standard in the creation of international financial institutions, which typically begin with a core group of anchor nations and expand as additional members join through charter negotiations and subsequent capital rounds. The DSRB is designed to complement the European Union’s SAFE initiative, offering a broader multilateral platform that brings together NATO and Indo-Pacific nations and mobilises global capital to build the balance-sheet capacity required to finance nations’ defence spending and long-term res
ClickUp 4.0's Craft & Quality is Available Today, Maximizing Human Productivity10.12.2025 20:26:00 EET | Press release
ClickUp today announced the launch of ClickUp 4.0, a groundbreaking release designed to end the chaos of work sprawl and usher in a new era of work. With a bold vision for the convergence of software, people, and AI, ClickUp 4.0 delivers a suite of powerful new features that empower teams to do their best work in one converged workspace. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20251210712132/en/ A new era of ClickUp For years, organizations have struggled with fragmented workflows, siloed tools, and the constant friction of context switching. ClickUp 4.0 is the answer: a single, beautifully crafted workspace that brings together tasks, docs, goals, chat, and AI-powered automation. The result is a platform that not only saves time but also sparks creativity and collaboration at every level. “Software is converging - we always knew it would. And it's about time, because work sprawl is the silent killer of productivity," s
United First Partners Serves as Introducing Broker on Mayflower IPO, a UK Listed Acquisition Vehicle and Among the Largest Primary New Issues in London in 2025, Highlighting UFP’s Increasing Presence Across ECM10.12.2025 19:42:00 EET | Press release
United First Partners (“UFP”) is pleased to announce its role as Introducing Broker on Mayflower Acquisition Limited (“Mayflower”), which completed its IPO today, raising USD 500 million. The size of the capital raised places Mayflower among the largest London acquisition vehicles of recent years. The offering represents an important development for UFP’s expanding capital markets platform and reflects the firm’s increasing activity within Equity Capital Markets (ECM). About Mayflower Acquisition Limited Mayflower is a UK Listed Acquisition Vehicle, sponsored by TOMS Capital and JRJ Group, incorporated to unlock exits across a closely-held company universe, including long-held private equity assets and large family-owned businesses. Mayflower’s structure provides guaranteed capital to asset owners, offering a flexible liquidity solution and higher potential for transaction success, and highly aligned economics to investors, with a significant Sponsor commitment of USD 75m. Mayflower wa
In our pressroom you can read all our latest releases, find our press contacts, images, documents and other relevant information about us.
Visit our pressroom