Title: 
Numerical Simulations by Quantum Computer for Computational Mechanics 

Speaker: 
Prof. Mayu Muramatsu 

Affiliation: 
Keio University 

When: 
Wednesday, October 2, 2024 at 11:00:00 AM 

Where: 
MRDC Building, Room 4211 

Host: 
Yan Wang  
Abstract Quantum computers have been rapidly developed in the recent decade as the nextgeneration technology accelerator. In particular, quantum annealing machines can search for the minimum value of the objective function at high speed. They are often applied to combinational optimization problems involving the objective functions of the target. If the objective function can be replaced with energy expressing the target phenomenon, quantum acceleration of finding of equilibrium state acquisition can be expected by a physics simulation. In this presentation, the research examples of the phasefield simulation will be introduced. A novel model to be applied to nextâ€‘generation accelerators, Ising machines, is formulated on the basis of the phaseâ€‘field model of the phaseâ€‘separation structure of a diblock polymer. The phaseâ€‘field model has demonstrated its high performance in material development, though it takes a long time to achieve equilibrium. Although the convergence time problem might be solved by the nextâ€‘generation accelerators, no solution has been proposed. We show the calculation of the phaseâ€‘separation structure of a deblock polymer as the equilibrium state using phaseâ€‘field model by an actual Ising machine. The proposed new model brings remarkable acceleration in obtaining the phaseâ€‘separation structure, which can be solved on a largeâ€‘scale quantum annealing machine. The significant acceleration of the phaseâ€‘field simulation by the quantum technique pushes the material development to the next stage. Besides the phasefield simulation, the structural analysis and the fluid simulation by quantum annealing will be introduced as well in the presentation. 

Biography Mayu Muramatsu is an associate professor in the department of mechanical engineering and leads a research group at Keio university. Dr. Muramatsu earned her Ph.D. in the department of mechanical engineering from Keio University in 2011. She then worked as a researcher at the National Institute of Advanced Industrial Science and Technology from 2012 to 2013. From 2014 to 2017, she served as an assistant professor at Tohoku university. In 2018, she returned to Keio university as a senior assistant professor, leading her own research initiatives. Since 2022, she has been serving as an associate professor in the department of mechanical engineering at Keio university. Her laboratory focuses on multiphysics in a broad spectrum of materials including metals, polymers and ceramics. Specifically, the group conducts mathematical modeling and numerical simulation of materials for functional devices such as fuel cells by coupling the mechanical behavior with other phenomena and/or bridging different scale phenomena. The group also has interests in experimental validation of simulation models and development of new CAE techniques using machine learning and quantum computer. 