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SUMMARY:ECE QUANTUM ENGINEERING SEMINAR SERIES: Joshua Viszlai
DESCRIPTION:A Systems Approach to Fault-Tolerant Quantum Computing\n\n\n\n\n\n\n\nJoshua Viszlai\n\n\n\nAbstract:  We are beginning a remarkably exciting time for quantum computing. There is a growing consensus that quantum error correction (QEC) is needed to reach scales necessary for quantum advantage\, and recent major demonstrations have led to a new generation of error-corrected quantum computers. These demonstrations transition QEC from a theoretical idea introduced in 1995 to an experimental reality. Underlying this milestone is rapid progress in the scale of quantum hardware\, with systems today featuring up to 1\,000 qubits and error rates nearing 0.1%. However\, looking towards the future\, significant work is still needed to organize and scale quantum hardware to create fault-tolerant quantum computers (FTQC) capable of practical quantum advantage.While the theory of FTQC is promising\, effectively connecting it to real devices poses significant challenges. In this talk I will discuss the role of systems and architecture research in efficiently addressing these challenges\, focusing on two examples of my work. First\, I will describe the problems involved in large-scale\, real-time QEC decoding\, and detail a speculative window decoder that reduces decoder reaction time by up to 50%. Second\, I will show how insights from decoding lead to a heuristic for compiling QEC codes that reduces logical error rates by 2.5x-4x and helps automate QEC design space exploration. Together\, these works fit into a larger vision on a full-stack view of FTQC and highlight opportunities for interdisciplinary\, systems-level research to accelerate the realization of large-scale quantum computing. \n\n\n\nBio: Joshua Viszlai is a Ph.D. student at the University of Chicago advised by Fred Chong. His research spans both theory and experiment with a focus on bridging the gap between current quantum devices and fault-tolerant quantum computing. His work has been implemented in quantum hardware and has been published in top-tier conferences in the fields of computer architecture and quantum computing leading to two best paper awards and a best poster honorable mention award. Joshua is also a consultant at Infleqtion\, a company developing neutral atom quantum computers\, where he helps lead research on quantum error correction.
URL:https://engineering.wisc.edu/event/ece-quantum-engineering-seminar-series-joshua-viszlai/
LOCATION:2534 Engineering Hall\, 1415 Engineering Drive\, Madison\, Wisconsin\, 53706\, United States
CATEGORIES:Electrical & Computer Engineering,Seminar
ATTACH;FMTTYPE=image/jpeg:https://engineering.wisc.edu/wp-content/uploads/2026/02/2026-Faculty-Recruiting-Seminars-Plain-for-website-1.avif
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DTSTART;TZID=America/Chicago:20260317T100000
DTEND;TZID=America/Chicago:20260317T110000
DTSTAMP:20260421T045641
CREATED:20260226T192925Z
LAST-MODIFIED:20260226T193013Z
UID:10001476-1773741600-1773745200@engineering.wisc.edu
SUMMARY:ECE QUANTUM ENGINEERING SEMINAR SERIES: Dr. Shai Tsesses
DESCRIPTION:Unlocking New Capabilities for Quantum Computation with Neutral Atom Arrays\n\n\n\n\n\n\n\nDr. Shai Tsesses\n\n\n\nAbstract: Neutral atom arrays have become a frontrunner in the race for utility scale quantum computation [1]\, building on their reconfigurability [2]\, scalability [3] and high fidelity for all operations [4] – idling\, detection\, single- and two-qubit gates. However\, they still suffer from key bottlenecks that constrain their operational speed and their implementation of deep quantum circuits. In this talk\, I will show how my recent work can bend these constraints and sometimes completely break them. I will present results on accelerated detection of the atoms via high-lying energy states (Rydberg states) [5] and introduce novel protocols for reconfigurable multi-qubit gates [6]\, promoting improved circuit implementation speed for error correction. I will then update on our current progress in building a continuously operating neutral atom quantum processor\, which mitigates the negative influences of atom loss\, and present a new scheme we developed to operate atom array systems for this purpose [7]. Lastly\, I will touch on the final frontier – how to increase system size to a utility scale number of qubits and provide my own solution to it: free electron quantum interconnects between neutral atom quantum processing modules. \n\n\n\nBio: Dr. Shai Tsesses is a postdoctoral associate at the MIT–Harvard Center for Ultracold Atoms\, working with Prof. Vladan Vuletić. At MIT\, he is leading a team developing the next generation of neutral atom quantum processors\, able to implement deep and high-fidelity quantum circuits. Dr. Tsesses earned his Ph.D. in Electrical Engineering from the Technion–Israel Institute of Technology\, where he made key experimental contributions to topological and quantum nano-photonics\, as well as free-electron–light interactions. His research explores the frontiers of light–matter interaction\, bridging atomic physics\, electron beam physics\, and quantum information science. He has authored more than 30 publications in leading journals such as Science and Nature\, and is a recipient of numerous fellowships and awards\, including the Rothschild and Adams Fellowships\, as well as the OPTICA Tingye Li Innovation Prize.
URL:https://engineering.wisc.edu/event/ece-quantum-engineering-seminar-series-dr-shai-tsesses/
LOCATION:2317 Engineering Hall\, 1415 Engineering Drive\, Madison\, 53711
CATEGORIES:Electrical & Computer Engineering,Seminar
ATTACH;FMTTYPE=image/jpeg:https://engineering.wisc.edu/wp-content/uploads/2026/02/2026-Faculty-Recruiting-Seminars-Plain-for-website-1.avif
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DTSTART;TZID=America/Chicago:20260318T100000
DTEND;TZID=America/Chicago:20260318T110000
DTSTAMP:20260421T045641
CREATED:20260303T203811Z
LAST-MODIFIED:20260303T203814Z
UID:10001482-1773828000-1773831600@engineering.wisc.edu
SUMMARY:ECE QUANTUM ENGINEERING SEMINAR SERIES: Hezi Zhang
DESCRIPTION:Quantum Computing Systems: Toward Scalable and Efficient Quantum Computation\n\n\n\n\n\n\n\nHezi Zhang\n\n\n\nAbstract: Quantum computing has emerged as a transformative frontier of computation. In recent years\, quantum hardware has scaled at an unprecedented rate. As this momentum continues\, the central challenge is shifting upward in the stack—from hardware-level feasibility toward system-level scalability. This talk will focus on quantum computer architecture and compiler systems\, introducing the challenges and opportunities to efficiently harness device capabilities and lower the demands on hardware technology\, thereby accelerating timelines for practical quantum advantage. \n\n\n\nBio: Hezi Zhang is a fifth-year Ph.D. candidate in the Computer Science and Engineering (CSE) department at the University of California\, San Diego (UCSD). She received her M.S. in Computer Science from the Georgia Institute of Technology (GT) and her B.S. in Physics from the University of Science and Technology of China (USTC). Her current research interests lie in quantum computing architecture and compiler optimization\, including supporting scalable quantum computing and exploring different quantum computing paradigms.
URL:https://engineering.wisc.edu/event/ece-quantum-engineering-seminar-series-hezi-zhang/
LOCATION:2534 Engineering Hall\, 1415 Engineering Drive\, Madison\, Wisconsin\, 53706\, United States
CATEGORIES:Electrical & Computer Engineering,Seminar
ATTACH;FMTTYPE=image/jpeg:https://engineering.wisc.edu/wp-content/uploads/2026/02/2026-Faculty-Recruiting-Seminars-Plain-for-website-1.avif
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