Upcoming Colloquia

Affiliation: Cal Berkeley
Time: 4:00 PM
Location: C215 ESC or Live Online

Atomic Physics

Affiliation: University of Texas at Austin
Time: 12:00 PM
Location: C215 ESC or Live Online

Quantifying variability of dynamic properties due to additive manufacturing process of an acoustic metamaterial design

Acoustic metamaterials have been used to enable exotic wave manipulation including demonstrations of negative refractive index, non-reciprocity, and wave focusing along with many other examples. These exotic functionalities are achieved by designing structures such that sub-wavelength features interact with incident waves to achieve effective material properties. The rise of additive manufacturing (AM) or 3D printing has been crucial to demonstration of metamaterial concepts due AM’s accessibility and its utility in fabrication of complex geometries not producible by other methods. Despite widespread AM use in the acoustics community, specifically in the area of acoustic metamaterials, many of the consolidated materials resulting from AM processes are under-characterized for relevant material properties at length scales of interest. This material characterization problem is complicated by the wide range of printer settings that the user can select when fabricating a printed part. While these user selections are qualitatively understood to result in deviations in printed geometry or variability in material properties, studies which quantify these properties are extremely limited. This talk will provide background on the wave manipulation via acoustic metamaterials and highlight the fabrication challenges encountered due to required complex and multi-scale geometry. Recent efforts will be described which utilized an interlaboratory study to characterize vibration performance of multi-scale geometry built via fused deposition modeling at six institutions.

Biographical Sketch:

Dr. Christina Naify is a Research Scientist at the Applied Research Laboratories at the University of Texas at Austin. Her areas of research include acoustic metamaterials for wave manipulation and material characterization, specifically of additively manufactured materials. She earned her BS from UC Berkeley in Mechanical Engineering and a MS and PhD in Materials Science from the University of Southern California. Dr. Naify is the former chair of the Structural Acoustics Technical Committee for the Acoustical Society of America and is a Fellow of the Society.

Affiliation:
Time: 4:00 PM
Location: C215 ESC or Live Online

3MT

Affiliation: Quantinuum
Time: 4:00 PM
Location: C215 ESC or Live Online

Science in Industry: Scaling Quantum Computing at Quantinuum

Quantinuum is a world leader in quantum computing, holding numerous records for hardware performance in our trapped-ion systems, a world-class software and applications team, and an unparalleled commitment to scientific rigor and integrity. With the recent launch of Helios, our newest quantum computer, we have a machine that cannot be simulated classically, boasting 98 fully-connected qubits and the highest fidelity of any quantum computer released to the market. In today’s colloquium, I will discuss the exciting things we’re doing at Quantinuum through the lens of my own work as an experimentalist working on atomic sources for our quantum computers. I will also use this experience to illustrate the nature of scientific research in cutting edge industry, showing physicists their unique role working with engineers, programmers, technicians, machinists, and others as we tackle unique challenges.

Biographical Sketch:

Jacob Johansen received his BS from BYU in 2010 and PhD from the University of Chicago in 2017. In 2018, he joined Honeywell Quantum Solutions, which then joined with Cambridge Quantum Computing to form Quantinuum in 2021. Dr. Johansen specializes in hardware development and experimental design, working with an interdisciplinary team to develop innovative approaches to scaling quantum computers. In his time at HQS and Quantinuum, Dr. Johansen built up the H2 quantum computer all the way from the initial build of the vacuum chamber through commercial launch and has worked on the atomic source team, developing new ways to deliver atoms and ions to Quantinuum quantum computers.

Affiliation: ORNL
Time: 4:00 PM
Location: C215 ESC or Live Online

Electron Microscopy

Affiliation: University of Maryland
Time: 4:00 PM
Location: C215 ESC