September 28, 2021
  • Talk by Yutaka Tabuchi, RIKEN Center for Quantum Computing

    September 28, 2021  4:00 pm - 5:00 pm

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    Meeting ID: 865 6257 0055


    Title: Quantum computers inscience and engineering era

    Speaker: Yutaka Tabuchi, RIKENCenter for Quantum Computing

    Abstract: Quantumcomputing gains intensive attention to broad fields of researchers, people inthe industry, governments, and many scientific fans all over the world. InRIKEN Center for Quantum Computing, we research superconducting quantumcomputers by developing the quantum computers themself. While we know thatfundamental elements in hardware include superconducting circuits fabricated ona silicon substrate, packaging enclosure, wiring inside a cryostat, controlelectronics, and signal processing circuits, a scalable organization of theelements for quantum computers are in the research stage. Here, I will focus onthe I/O interface between a chip and control electronics and discuss thescalable wiring architecture for a future goal. Having reconsidered currentbottlenecks, we find that the uniformity of devices and quantum gates, exploitsof translation symmetry in the surface code, and wiring hierarchization lead toI/O bandwidth reduction. I will lastly introduce a stacked heterogeneousquantum module structure as an organization of quantum computers.


    Bio: Yutaka Tabuchi received his D. Eng. in2020 at Osaka University with research on the control of electron spin qubitsin a molecule. After his graduation, he started working at the University ofTokyo. He demonstrated in 2015 the coherent coupling between a superconductingqubit and a single magnon in a ferromagnet, an essential technology inextending quantum internet in the future. In 2016, he started an early study onthe integration of superconducting qubits. He is a unit leader in RIKEN,pursuing quantum computation with superconducting circuits.


September 30, 2021
  • MajuLab Seminar by Alexia Auffèves, Institut Néel, CNRS, Grenoble, France

    September 30, 2021  4:00 pm - 5:00 pm

    Venue: Online Via Zoom

    Title: A short story of quantum and information thermodynamics

    Abstract: This seminar is a fast journey through the build-up of key thermodynamical concepts, i.e. work, heat and irreversibility -- and how they relate to information. Born at the time of industrial revolution to optimize the exploitation of thermal resources, these concepts have been adapted to small systems where thermal fluctuations are predominant. Extending the framework to quantum fluctuations is a great challenge of quantum thermodynamics, that opens exciting research lines e.g. measurement fueled engines or thermodynamics of driven-dissipative systems. On a more applied side, it provides the tools to optimize the energetic consumption of future quantum computers.
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    After registering, you will receive a confirmation email containing information about joining the meeting.


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