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Quantum BC Seminar Series – Mohammad Amin
December 12, 2023 @ 2:00 pm - 3:00 pm
Join us on Tuesday, December 12 at 2pm for a seminar by Dr. Mohammad Amin from D-Wave.
Mohammad will speak on the topic Critical scaling advantage in spin glass quantum optimization.
https://ubc.zoom.us/j/69443327772?pwd=TGhhTXFIQ3ZiUmNrN0pUa3FObTNydz09
Meeting ID: 694 4332 7772 Passcode: 996727
Title: Critical scaling advantage in spin glass quantum optimization
Abstract:
More than two decades ago, experiments on disordered alloys suggested that spin-glasses could be brought into low-energy states faster through quantum annealing than through conventional thermal annealing. Replicating this phenomenon in a programmable processor has remained a central challenge in quantum optimization. In this presentation, I will provide the first experimental demonstration of the critical scaling advantage of quantum annealing compared to classical algorithms, utilizing a superconducting quantum annealing processor with thousands of qubits [1]. I will offer a theoretical explanation of this advantage through the dynamics of quantum phase transition in spin-glasses. By extracting critical exponents, I will show a clear distinction between quantum annealing and the slower stochastic dynamics of analogous Monte Carlo algorithms. Finally, I will present recent results on Quantum Error Mitigation as a near-term approach to reduce errors when estimating expectation values [2]. Using Zero-Noise Extrapolation in the quantum critical dynamics of a transverse-field Ising spin-chain, I will present the successful mitigation of static control errors and thermal noise, extending coherent annealing time by nearly an order of magnitude.
[1] King et al., Nature 617, 61 (2023).
[2] Amin et. al. arXiv:2311.01306.
Bio:
Dr. Mohammad Amin is a Fellow at D-Wave Quantum Inc. and an adjunct professor in the Physics department at Simon Fraser University. He earned his PhD in condensed matter physics from the University of British Columbia in 1999. Since joining D-Wave in 2000, Dr. Amin has played a pivotal role in the development of D-Wave’s large-scale quantum annealing processors, contributing to both theoretical and experimental understandings of their complex behavior. His expertise spans various domains, including superconducting qubits, noise and decoherence in superconducting circuits, the theory of open quantum systems, quantum critical phenomena, and quantum machine learning.