140 Delta Epsilon Ct., Clemson, SC 29634, USA

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Superconducting Qubits: from Toy Models to Real Quantum Machines

 

Pat Gumann, Ph.D.

IBM Quantum

Yorktown Heights, NY, USA

 

Quantum computing is a fast-developing field pursued by many academic groups as well as industrial research & development centers. In this talk, I will give a short overview of the current state-of-the-art superconducting qubit-based quantum computing efforts and point out their technical challenges, followed by a few ideas on how to overcome those challenges. The solutions were motivated by studying two kinds of materials, a 'legend'-germanium on silicon, and recently fabricated Josephson junctions based on monolayer tungsten ditelluride (WTe2). The extremely high hole mobilities attainable in strained germanium quantum wells could potentially provide a unique pathway to developing the next generation of quantum computing systems whereas semi-metals like WTe2 will help us understand the physics behind the coexistence of superconductivity and QSHE.

 

Bio: Dr. Pat Gumann is currently a senior manager at IBM TJ Watson Research Center in Yorktown Heights, NY where he has been pursuing superconducting quantum computing since 2016. Earlier this year, together with his team of 4 scientists, he successfully deployed the world's largest cryogenic system ever built with a base cooldown temperature of 25 mK. Pat received his Ph.D. in experimental condensed matter physics from the Darmstadt University of Technology in Germany, in 2007 and has worked at various research facilities over his career, including Leiden University, The Institute for Solid State Physics at the University of Tokyo, the Low-Temperature Laboratory at Kyoto University, The Institute for Quantum Computing at the University of Waterloo in Canada, and the Department of Physics at Harvard University. His research focus has ranged from quantum fluids and solids to quantum sensing, and for the past decade experimental quantum computing.

 

Refreshments will be served after the colloquium in the PandA Café.

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Meeting ID: 956 6217 1730 Passcode: 461889

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