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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-8737
DTSTART:20240424T190000Z
DTEND:20240424T210000Z
DTSTAMP:20260413T223405Z
LAST-MODIFIED:20240424T131015Z
LOCATION:5310 Chamberlin or https://uwmadison.zoom.us/j/91637006419?pw
 d=TEw5US90dXdrUGxTTlUwSG1qbDFodz09
SUMMARY:Scaling Technologies for Si/SiGe Quantum Dot Qubits\, Prelimin
 ary Exam\, Michael Wolfe\, Physics Graduate Student
DESCRIPTION:In this talk\, I will discuss several solutions to the sca
 le-up problem for solid-state quantum computers. This work focuses on 
 semiconductor quantum-dot qubits in Si/SiGe\, which share material com
 patibility with the existing microprocessor industry. I will show how 
 to leverage this compatibility through the fabrication of a classical 
 on-chip multiplexer to reduce the number of wires needed to control an
  array of Si/SiGe quantum devices. I will demonstrate the power of the
  multiplexer by performing rapid device diagnostics across the device 
 array\, and discuss pathways to scale up a quantum processor by deploy
 ing this technology for multiplexed readout. Next\, I will show how to
  control in-situ the threshold voltages of Si/SiGe devices using cryog
 enic illumination. This technique rearranges the trapped charge at the
  oxide-semiconductor interface\, in turn improving the uniformity of t
 he operating voltages of Si/SiGe devices which can greatly simplifying
  the operation of large arrays of quantum dot qubits.
URL:https://www.physics.wisc.edu/events/?id=8737
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