Acoustic Geometric Phase Computing, Sensing and Engineering
Par M. Pierre Deymier,
Professeur à « The University of Arizona, Tucson, USA » et « Fellow Ambassador of CNRS »
Lundi 02 juin à 14h dans l’amphithéâtre du LCI, portant sur le concept de phase géométrique en acoustique
Brief Bio: Pierre A. Deymier is a professor of materials science and engineering at the University of Arizona. He is Director of the US National Science Foundation (NSF)-funded New Frontiers of Sound Science and Technology Center.
He is also a faculty member in the BIO5 Institute, biomedical engineering program and applied mathematics graduate interdisciplinary program. He was Head of the Department of Materials Science and Engineering from 2011 to 2021 and Director of the School of Sustainable Engineered Systems during the period 2009-2017.
He was a Founding Dean and served as Interim Associate Dean (2021-2023) of the Arizona College of Technology at Hebei University of Technology (HEBUT), Tianjin, China.
In 2024, Deymier was selected by the French Centre National de la Recherche Scientifique (CNRS) as Fellow Ambassador ( See https://www.cnrs.fr/fr/actualite/fellow-ambassadeurs-du-cnrs-la-seconde-promotion-devoilee).
He received the Felix Bloch Prize from the International Phononics Society in 2023.
Abstract: « The concept of the geometric representation of acoustic fields can serve as a powerful platform for the interpretation and exploitation of a very broad range of topological acoustic phenomena for fundamental wave physics but also practical technologies. Geometric phase computing, sensing and engineering are emerging as potential approaches which broaden the range of applications of the notion of geometric phase in the areas of information processing, sensing and telecommunication.
In particular, I will present examples of scalable quantum-like gates and operations which can be realized on classical acoustic metamaterials in order to overcome challenges faced by actual quantum computing platforms. Furthermore, unusual properties of the geometric phase can also be used to address engineering challenges such as in telecommunication and may, for instance, offer approaches for the reduction in reflection loss of radio frequency (RF), increase quality factor while retaining footprint of micro acoustic wave devices used in cell phone technologies. Finally, I will extend the concept of geometric phase sensing to topological acoustic sensing by exploiting topological features to enhance sensitivity.
I will show two examples at different scales: (a) geometric phase sensing of large-scale environmental perturbations in the ground such as localized permafrost thawing lenses in the warming arctic requiring long wavelength waves (e.g., seismic waves) and (b) sensing microscale structural flaws and defects (e.g., microcracks) in manufactured engineered parts using short wavelength ultrasonic waves. »
