Layout of qubits in Google’s Sycamore architecture.
Researchers from the University of Bristol and quantum start-up, Phasecraft, have advanced quantum computing research, bringing practical hybrid quantum-classical computing one step closer.
The team, led by Bristol researcher and Phasecraft co-founder, Dr. Ashley Montanaro, has discovered algorithms and analysis which significantly lessen the quantum hardware capability needed to solve problems which go beyond the realm of classical computing, even supercomputers.
In the paper, published in Physical Review B, the team demonstrates how optimised quantum algorithms can solve instances of the notorious Fermi-Hubbard model on near-term hardware.
The Fermi-Hubbard model is of fundamental importance in condensed-matter physics as a model for strongly correlated materials and a route to understanding high-temperature superconductivity.
Finding the ground state of the Fermi-Hubbard model has been predicted to be one of the first applications of near-term quantum computers and one that offers a pathway to understanding and developing novel materials.
Dr. Ashley Montanaro, research lead and co-founder of Phasecraft: “Quantum computing has critically important applications in materials science and other domains. Despite the major quantum hardware advances recently, we may still be several years from having the right software and hardware to solve meaningful problems with quantum computing. Our research focuses on algorithms and software optimisations to maximise the quantum hardware’s capacity, and bring quantum computing closer to reality.
“Near-term quantum hardware will have limited device and computation size. Phasecraft applied new theoretical ideas and numerical experiments to put together a very comprehensive study on different strategies for solving the Fermi-Hubbard model, zeroing in on strategies that are most likely to have the best results and impact in the near future.
Lana Mineh, a PhD student in the School of Mathematics and the Centre for Doctoral Training in Quantum Engineering, who played a key role in the research, said, “The results suggest that optimising over quantum circuits with a gate depth substantially less than a thousand could be sufficient to solve instances of the Fermi-Hubbard model beyond the capacity of current supercomputers. This new research shows significant promise for producing the ground state of the model on near-term quantum devices, improving on previous research findings by around a factor of 10.”
Physical Review B, published by the American Physical Society, is the top specialist journal in condensed-matter physics. The peer-reviewed research paper was also chosen as the Editors’ Suggestion and to appear in Physics magazine.
Andrew Childs, Professor in the Department of Computer Science and Institute for Advanced Computer Studies at the University of Maryland: “The Fermi-Hubbard model is a major challenge in condensed-matter physics, and the Phasecraft team has made impressive steps in showing how quantum computers could solve it. Their work suggests that surprisingly low-depth circuits could provide useful information about this model, making it more accessible to realistic quantum hardware.”
Hartmut Neven, Head of Quantum Artificial Intelligence Lab, Google: “Sooner or later, quantum computing is coming. Developing the algorithms and technology to power the first commercial applications of early quantum computing hardware is the toughest challenge facing the field, which few are willing to take on. We are proud to be partners with Phasecraft, a team that are developing advances in quantum software that could shorten that timeframe by years.”
Phasecraft Co-founder Dr. Toby Cubitt: “At Phasecraft, our team of leading quantum theorists have been researching and applying quantum theory for decades, leading some of the top global academic teams and research in the field. Today, Ashley and his team have demonstrated ways to get closer to achieving new possibilities that exist just beyond today’s technological bounds.”
Phasecraft has closed a record seed round for a quantum company in the UK with £3.7m in funding from private-sector VC investors, led by LocalGlobe with Episode1 along with previous investors. Former Songkick founder Ian Hogarth has also joined as board chair for Phasecraft. Phasecraft previously raised a £750,000 pre-seed round led by UCL Technology Fund with Parkwalk Advisors and London Co-investment Fund and has earned several grants facilitated by InnovateUK. Between equity funding and research grants, Phasecraft has raised more than £5.5m.
Dr. Toby Cubitt: “With new funding and support, we are able to continue our pioneering research and industry collaborations to develop the quantum computing industry and find useful applications faster.”
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
Hybrid quantum-classical computing
- An Introduction to D-Wave Technologyon April 28, 2021 at 1:45 pm
This report presents a high-level overview of the annealing-based quantum computers manufactured ... of superior performance from hybrid quantum/classical solvers, compared to purely classical ...
- An Introduction to D-Wave Technologyon April 27, 2021 at 10:00 am
A survey of hundreds of application problems that have been implemented to run on D-Wave processors is also presented, together with a review of some promising early demonstrations of superior ...
- Best of arXiv.org for AI, Machine Learning, and Deep Learning – March 2021on April 21, 2021 at 6:00 am
In this recurring monthly feature, we will filter all the recent research papers appearing in the arXiv.org preprint server for subjects relating to AI, machine learning and deep learning – from ...
- Hybrid quantum annealing via molecular dynamicson April 19, 2021 at 5:47 am
A novel quantum–classical hybrid scheme is proposed to efficiently solve large-scale combinatorial optimization problems. The key concept is to introduce a Hamiltonian dynamics of the classical ...
- Materials challenges and opportunities for quantum computing hardwareon April 18, 2021 at 11:11 am
1 Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA. 2 School of Fundamental Science and Technology, Keio University, Yokohama 223-8522, Japan. 3 Department of ...
Go deeper with Google Headlines on:
Hybrid quantum-classical computing
Go deeper with Bing News on:
- Will quantum computing deliver a big leap forward for battery cells?on April 30, 2021 at 11:07 am
The German Aerospace Center and Cambridge Quantum Computing are exploring how quantum computing could improve battery development.
- Quantum computing only five years awayon April 30, 2021 at 2:48 am
Security experts fear Quantum ApocalypseQuantum computing could be brought to bear on some of the most complex calculations in financial markets within five years, according to research jointly ...
- IonQ: Take a Leap with Quantum Computing?on April 30, 2021 at 2:00 am
What was particularly exciting about this year's March technology selloff was the opportunity to evaluate smaller capitalization stocks set to benefit from significant structural changes in the ...
- Startup claims new "quantum analog computer" solved the traveling salesman problem for 128 citieson April 29, 2021 at 2:29 pm
Founder says the infinityQube operates at room temperature and can integrate with existing high-performance computers.
- We could detect alien civilizations through their interstellar quantum communicationon April 29, 2021 at 6:50 am
Since the mid-20th century, scientists have been looking for evidence of intelligent life beyond our solar system. For much of that time, scientists who are engaged in the search for extraterrestrial ...