D-Wave Demonstrates Large-Scale Coherent Quantum Annealing

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First large-scale demonstration of coherence in quantum annealers, further exploitation of coherent dynamics in quantum optimization, machine learning and simulation tasks

BURNABY, BC & PALO ALTO, Calif.–(BUSINESS WIRE)–D-Wave Quantum Inc. (NYSE: QBTS), a leading provider of quantum computing systems, software and services – and the only provider capable of both annealing and gate-model quantum computer, today published a peer-reviewed landmark study of the first large-scale demonstration of coherent quantum annealing. The research shows for the first time the dynamics of a quantum phase transition in a large programmable quantum anneal processor using up to 2000 qubits in a D-Wave processor. This demonstration goes beyond the scope of any previous programmable quantum phase transition and opens the door to simulations of exotic phases of matter (unusual states of matter outside of the liquid, solid, or gas that make up the Universe) that would otherwise be elusive.

The paper — a collaboration between scientists from D-Wave, the University of Southern California, the Tokyo Institute of Technology and Saitama Medical University — titled “Coherent quantum annealing in a 2000-qubit programmable Ising chain,” was published in Peer -Review Journal natural physics today and is available here. The study shows that the fully programmable D-Wave quantum processor can be used as an accurate large-scale simulator of coherent quantum dynamics. This was demonstrated by showing the patterns of “kinks” separating correlated spins in almost perfect agreement with exact analytical solutions of the famous Schrödinger equation for an ideal quantum system completely isolated from external noise. The density and spacing of the kinks depend, among other things, on the speed and “quantum nature” of the experiment. Measurements of single-qubit parameters have been shown to accurately predict the behavior of systems from 8 to 2000 qubits, demonstrating a high level of control in quantum simulations at all scales.

“Essentially, these experiments measured the D-Wave processor against a very well-understood quantum scale,” said Dr. Andrew King, director of performance research at D-Wave. “We found excellent agreement between theory and experiment, and this gives us a lot of confidence in our ability to manipulate programmable quantum systems, both for optimization applications and exotic quantum simulations.”

“By studying quantum dynamics on a much shorter timescale than previously thought possible with D-Wave’s quantum annealers, this experiment demonstrates that these devices can be operated with no discernible impact from the external environment. This opens the door to quantum simulations of models that are too large and complex to be simulated by other means currently available,” said Daniel Lidar, Viterbi Professor of Engineering and director of the USC Center for Quantum Information Science & Technology, University of Southern California.

“This paper paves the way to practical quantum simulations on a substantial scale unexplored by other means, including classical computations,” said Hidetoshi Nishimori, professor at the Institute of Innovative Research at the Tokyo Institute of Technology.

“Coherence is the holy grail of quantum computing. By simulating a closed quantum system without thermal effects at large scale, we can gain invaluable insight into the computational power of our processors, increasing the ability to find high-quality solutions for our customers,” said Alan Baratz, CEO of D-Wave. “Ongoing advances in coherence times are a key priority for both our temper and gate model programs. The large-scale demonstration of coherence is another step towards proving the practical quantum advantage, and today’s research is a significant step toward that milestone.”

The importance of this achievement goes beyond the fundamental scientific aspect of understanding quantum phase transitions in one-dimensional matter. By providing the technical basis for large-scale quantum simulations, it has paved the way for scientific understanding of the properties of a wider range of quantum materials.

In addition, the scientific achievements are presented in natural physics underpin D-Wave’s continued commitment to relentless scientific innovation and product delivery. To date, D-Wave has launched five generations of quantum computers, and in June 2022 it launched an experimental prototype of its sixth-generation machine, Advantage2. Announced in fall 2021 as part of the company clarity Roadmap and expected to be available in 2023-2024. The full Advantage2 system is expected to contain over 7,000 qubits with a new qubit design that will enable 20-way connectivity between qubits in a new topology. The company also has a broad portfolio of more than 200 patents applicable to both annealing and gate-based quantum computing. And earlier this year, D-Wave opened the first Advantage™ quantum cloud service physically located in the United States, located at the USC-Lockheed Martin Quantum Computing Center (QCC), housed within the Information Sciences Institute (ISI ) of USC, a unit hosted by the prestigious University of Southern California Viterbi School of Engineering.

Read more about the research in our Medium post here.

About D-Wave Quantum Inc.

A leader in the development and delivery of quantum computing systems, software and services, D-Wave is the world’s first commercial quantum computer vendor – and the only company to manufacture both thermionic and gate-model quantum computers. Our mission is to unleash the power of quantum computing today for the benefit of business and society. We do this by delivering customer value with practical quantum applications for problems as diverse as logistics, artificial intelligence, materials science, drug discovery, scheduling, cybersecurity, failure detection, and financial modeling. D-Wave products are used by some of the world’s most progressive organizations including NEC Corporation, Volkswagen, DENSO, Lockheed Martin, Forschungszentrum Jülich, University of Southern California and Los Alamos National Laboratory.

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Source: D-Wave Quantum Inc.