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BEGIN:VEVENT
DTSTAMP:20260524T180046Z
DTSTART;VALUE=DATE-TIME:20250129T163000
DTEND;VALUE=DATE-TIME:20250129T173000
SUMMARY:Charles G. Smith (Cambridge): Scaling up for quantum measurement 
 and quantum computing
TZID:Europe/London
UID:20250129-8ac672c5941ae0ab01943bdfc03e7f32@warwick.ac.uk
CREATED:20250110T090749Z
DESCRIPTION:Abstract: The talk will have two parts\, the first focusing o
 n research on low-temperature multiplexing techniques to allow scale up 
 of the number of quantum devices that can be measured at cryogenic tempe
 ratures. In this part I will discuss how we were able to measure 571 qua
 ntum constriction devices of varying dimensions using an on-chip multipl
 exer to better understand the origin of the 0.7(2e2/h) anomalous conduct
 ance plateau found close to pinch-off. This allowed us to identify which
  models best fit the experiments. We modified this device to investigate
  arrays of exfoliated graphene devices and to also explore arrays of qua
 ntum dots. In the second part of the talk\, I will discuss our work on h
 igh fidelity readout of the spin state of an electron in a quantum dot s
 howing that it can be read out with a fidelity of 99.2% in 5.6us. With t
 he growing achievements in error correction\, fast high-quality readout 
 is now needed for quantum computing scale up as the clock speed is limit
 ed by the error correction readout time.
LOCATION:
CATEGORIES:Departmental Colloquium
LAST-MODIFIED:20250110T090749Z
ORGANIZER;CN=Valery Nakariakov:
END:VEVENT
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