First ever demonstration of large-scale
coherence in quantum annealers, further exploiting coherent
dynamics in quantum optimization, machine learning, and simulation
tasks
D-Wave Quantum Inc. (NYSE: QBTS), a leader in quantum computing
systems, software, and services—and the only provider building both
annealing and gate-model quantum computers, today published a
peer-reviewed milestone study of the first large-scale
demonstration of coherent quantum annealing. The research exhibits,
for the first time, dynamics of a quantum phase transition in a
large-scale programmable quantum annealing processor using up to
2000 qubits in a D-Wave processor. This demonstration goes beyond
the scale of any previous programmable quantum phase transition,
opening the door to simulations of exotic phases of matter (unusual
states of matter, outside of liquid, solid or gas, that make up the
universe) that would otherwise be intractable.
The paper---a collaboration between scientists from D-Wave, the
University of Southern California, the Tokyo Institute of
Technology, and Saitama Medical University---entitled “Coherent
quantum annealing in a programmable 2000-qubit Ising chain,” was
published in the peer-reviewed journal Nature Physics today and is
available here. The study shows that the fully programmable D-Wave
quantum processor can be used as an accurate simulator of coherent
quantum dynamics at large scales. This was demonstrated showing the
patterns of “kinks” separating correlated spins in almost perfect
agreement with exact analytical solutions of the famous Schrodinger
equation for an ideal quantum system, completely isolated from
outside noise. The density and spacing of kinks depend on, among
other things, the speed and “quantumness” of the experiment.
Measurements of single-qubit parameters were shown to accurately
predict the behavior of systems from 8 to 2000 qubits,
demonstrating high levels of control in quantum simulations at all
scales.
“Essentially, these experiments measured the D-Wave processor
against a very well-understood quantum yardstick,” said Dr. Andrew
King, Director of Performance Research at D-Wave. “We found
excellent agreement between theory and experiment, and that gives
us a lot of confidence in our ability to manipulate programmable
quantum systems, both for optimization applications and for exotic
quantum simulations.”
“By examining quantum dynamics on a much shorter timescale than
previously thought possible using D-Wave’s quantum annealers, this
experiment demonstrates that these devices can operate without any
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 any 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 toward practical quantum simulations
of considerable scale unexplorable by other means including
classical computations,” said Hidetoshi Nishimori, Professor,
Institute of Innovative Research, Tokyo Institute of
Technology.
“Coherence is the holy grail of quantum computing. By simulating
a closed quantum system with no thermal effects at a large scale,
we can glean invaluable insights into our processors’ computational
power and thus increase the ability to find high quality solutions
for our customers,” said Alan Baratz, CEO of D-Wave. “Ongoing
advances in coherence times are an important priority for both our
annealing and gate-model programs. The demonstration of large-scale
coherence is another step towards demonstrating practical quantum
advantage, and today’s research is a significant step towards that
milestone.”
The significance of this achievement goes beyond the basic
scientific aspect of understanding quantum phase transitions in
one-dimensional matter. By establishing the technical basis for
large-scale quantum simulations, it has paved the way for
scientifically understanding the properties of a wider range of
quantum materials.
Further, the scientific achievements presented in Nature Physics
underpin D-Wave’s ongoing commitment to relentless scientific
innovation and product delivery. To date, D-Wave has brought to
market five generations of quantum computers and launched an
experimental prototype of its sixth-generation machine, Advantage2,
in June 2022. Announced in Fall of 2021 as part of the company’s
Clarity roadmap, and scheduled to be available in 2023-2024, the
full Advantage2 system is expected to feature 7,000+ qubits with a
new qubit design, enabling 20-way connectivity between qubits in a
new topology. The company also holds a broad portfolio of 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, which is located at the USC-Lockheed Martin Quantum
Computing Center (QCC) hosted at USC’s Information Sciences
Institute (ISI), a unit of the University of Southern California’s
prestigious Viterbi School of Engineering.
Read more about the research in our Medium post here.
About D-Wave Quantum Inc. D-Wave is a leader in the
development and delivery of quantum computing systems, software,
and services, and is the world’s first commercial supplier of
quantum computers—and the only company building both annealing
quantum computers and gate-model quantum computers. Our mission is
to unlock the power of quantum computing today to benefit business
and society. We do this by delivering customer value with practical
quantum applications for problems as diverse as logistics,
artificial intelligence, materials sciences, drug discovery,
scheduling, cybersecurity, fault detection, and financial modeling.
D-Wave’s products are being used by some of the world’s most
advanced organizations, including NEC Corporation, Volkswagen,
DENSO, Lockheed Martin, Forschungszentrum Jülich, University of
Southern California, and Los Alamos National Laboratory.
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Frank Lentini BCW media@dwavesys.com
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