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ME SEMINAR Pierre Deymier

November 8, 2022 @ 4:00 pm - 5:00 pm

Demystifying the Quantum Paradigm using Acoustic Metamaterials– Phi-bits as Quantum Computing Acoustics Analogues


Pierre Deymier
Professor of Materials Science and Engineering
University of Arizona

VIRTUAL SEMINAR
Tuesday, November 8, 2022
4:00 p.m.

Abstract
Ensuring U.S. leadership in quantum information science (QIS) is a national priority. While the phenomenon of entanglement is atthe core of future QIS technologies and an attribute of quantum mechanics (QM), the notion of “classical entanglement” hasrecently emerged. “Classical entanglement” possesses the non-separability and related complexity that are essential to reach thepromise of parallelism in quantum computing, but not the nonlocal aspect of quantum entanglement. A multipartite classicalsystem is in a non-separable state when its parts are strongly correlated, and any change imposed on one part affects all the otherparts. Such nonseparability creates the possibility of operating on the superpositions of states of a multipartite system in a parallelmanner. Non-separability of classical waves offers the parallelism of quantum superposition of states used in quantum computingyet without the fragility of decoherence. Indeed, while quantum wave functions (probability amplitude) collapse uponmeasurement or due to thermal fluctuations necessitating cryogenic conditions, classical wave functions (amplitudes) aremeasurable and remain coherent at room temperature. We introduce the notion of ‘phase-bits’ or ‘phi-bits’ in acousticmetamaterials. Specifically, a logical phi-bit associates with a two-state degree of freedom of a nonlinear acoustic wave, which canbe in a coherent superposition of states with complex amplitude coefficients. Therefore, phi-bits are classical analogues of qubits,the critical components of quantum computers. We have shown very recently that the strong coupling and nonlinearity of acousticwaves are a new way to realize the non-separable superpositions of phi-bit states spanning exponentially complex spaces, in aprerequisite to develop algorithms that exploit the computational parallelism arising from non-separability. In this presentation, wewill demonstrate using a combination of experimental and theoretical approaches: 1) the exponentially complex scalable spaces ofstates (Hilbert space) of multiple phi-bits; 2) the non-separability of their coherent superpositions, and 3) operability on thesestates. This demonstration is using a physical platform constituted of a metamaterial comprising arrays of externally driven,nonlinearly coupled acoustic waveguides. This work opens pathways to promising and validated modes of storing, processing, andretrieving information that should compare favorably with state-of-the-art quantum systems without suffering from quantumfragility.

Bio
Pierre A. Deymier is a professor of materials science and engineering at the University of Arizona. He is also a faculty member inthe BIO5 Institute, biomedical engineering program, and applied mathematics graduate interdisciplinary program. Deymierreceived his Ph.D. from the Department of Materials Science and Engineering at the Massachusetts Institute of Technology in 1985and subsequently joined the Universityof Arizona.Deymier has a wide range of interests in the field of materials science and engineering, including materials theory, modeling, andsimulation, the emerging field of acoustic metamaterials and phononic crystals, and topological acoustics, as well as biomaterials.He is the author or co-author of more than 280 scholarly products. He is the editor, author, or co-author of three books: P.A.Deymier Ed., “Phononic crystals and acoustic metamaterials,” Springer Series in Solid-State Sciences, 173, Springer, Berlin,(2013); P.A. Deymier, K. Runge and K. Muralidharan (Co-Eds) “Multiscale Paradigms in Integrated Computational MaterialsScience and Engineering,” Springer Series in Materials Science, 226, Springer, Berlin, (2015); and P.A. Deymier, K. Runge,“Sound Topology, Duality, Coherence, and Wave-Mixing: An Introduction to the Emerging New Science of Sound,” SpringerSeries in Solid-State Sciences, 188, (2017)

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Details

Date:
November 8, 2022
Time:
4:00 pm - 5:00 pm
Event Category:
Seminar Series

Location

Virtual