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SUMMARY:QSE Quantum Seminar: "High-coherence foundry-compatible supercondu
 cting qubit platform"
DTSTART:20260911T120000
DTEND:20260911T133000
DTSTAMP:20260923T110452Z
UID:037c398083ea68622b354662713d66f13c0e7c9ef6a324814cee1c31
CATEGORIES:Conferences - Seminars
DESCRIPTION:Anton Potočnik\nPlease join us for the QSE Center Quantum 
 Seminar with Anton Potočnik from imec who will give a talk about "Hig
 h-coherence foundry-compatible superconducting qubit platform" on Friday 
 September 11th from 12:00 to 13:30.\nLocation: \n\nPizzas will be availab
 le at 12:00. All PhDs\, postdocs\, students\, group leaders\, and PIs are
  welcome to join us.\n\nTITLE: "High-coherence foundry-compatible superco
 nducting qubit platform" \n\nABSTRACT: \nThe field of superconducting qu
 bit technology has experienced rapid development over the past two decades
 . Recent advancements in the fabrication\, control and measurement of supe
 rconducting quantum devices have enabled integration of hundreds of qubits
  on a single chip. However\, the path towards larger-scale integration of 
 thousands of qubits on a chip remains unclear. This talk presents imec’s
  platform for scalable superconducting qubit fabrication\, which is based 
 on foundry-compatible thin film processing [1] and overlay Josephson-junct
 ion fabrication [2]. The platform enables all-optical superconducting tran
 smon qubit fabrication on 300 mm wafers\, achieving near state-of-the-art 
 coherence times\, record-low aging and comparable Josephson junction varia
 bility to standard shadow-evaporation technique [3]. A key focus of this p
 resentation will be the understanding and mitigation of microwave losses i
 nduced by various fabricaiton steps such as Ar-milling [4]\, oxide removal
  [6\,7] and materials such as a-Ta [5] or ultra-high-resistivity silicon. 
 The talk will conclude with an outline of ongoing efforts toward large-sca
 le qubit characterization and control using cryo-CMOS electronics operatin
 g near qubits at the mixing-chamber plate of a dilution refrigerator [8].\
 n[1] Mongillo\, et al.\, IEDM (2022).\n[2] Verjauw et al.\, npj Quantum In
 formation 8\, 93 (2022).\n[3] Van Damme\, et al.\, Nature\, 634\, 74 (2024
 ).\n[4] Van Damme\, et al.\, PRA 20\, 014034 (2023).\n[5] Lozano\, et al. 
 Mater. Quantum. Technol. 4\, 025801 (2024).\n[6] Verjauw\, et al.\, PRA 16
 \, 014018 (2021).\n[7] Lozano\, et al.\, Advanced Science 12\, e09244 (202
 5).\n[8] Acharya\, et al.\, Nature Electronics\, 6\, 900 (2023).\n\nBIO:\n
 Anton Potočnik is a senior researcher at imec\, where he develops next-ge
 neration technologies for quantum computing applications. His research foc
 uses on identifying and mitigating sources of qubit decoherence\, interfac
 ing qubits with cryogenic CMOS electronics\, and advancing novel integrati
 on strategies to enable scalable quantum processors. He is the recipient o
 f a European Research Council (ERC) grant\, supporting his work on pushing
  the limits of cryo-CMOS operation at millikelvin temperatures for quantum
  computing. Prior to joining imec\, Anton was a postdoctoral researcher at
  ETH Zurich in Prof. Andreas Wallraff’s group\, where he worked on analo
 g quantum simulation\, including superconducting-qubit models of photosynt
 hetic processes. He received his PhD in physics from the University of Lju
 bljana\, with research focused on exotic superconductivity in organic supe
 rconductors under the mentorship of prof. Denis Arčon.
LOCATION:GC B3 30 https://plan.epfl.ch/?room==GC%20B3%2030
STATUS:CONFIRMED
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