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SUMMARY:IC Colloquium: The (quantum) signal and the noise
DTSTART:20240311T101500
DTEND:20240311T111500
DTSTAMP:20260928T175413Z
UID:4e0717cd2a648fd9174bcae8da4c52e122790583ff99ff12de978d29
CATEGORIES:Conferences - Seminars
DESCRIPTION:By : Yihui Quek - MIT\nIC/SB Faculty candidate\n\nAbstract\nCa
 n we compute on small quantum processors? In this talk\, I explore the ext
 ent to which noise presents a barrier to this goal by quickly drowning out
  the information in a quantum computation. Noise is a tough adversary: we 
 show that a large class of error mitigation algorithms -- proposals to "u
 ndo" the effects of quantum noise through mostly classical post-processing
  – can never scale up. Switching gears\, we next explore the effects of 
 non-unital noise\, a physically natural (yet analytically difficult) class
  of noise that includes amplitude-damping and photon loss. We show that it
  creates effectively shallow circuits\, in the process displaying the stro
 ngest known bound on average convergence of quantum states under such nois
 e. Concluding with the computational complexity of learning the outputs of
  small quantum processors\, I will set out a program for wrapping these lo
 wer bounds into new directions to look for near-term quantum computational
  advantage. \n\nBio\nYihui's research is centered on the questions "How c
 an we exploit the laws of Physics to compute faster\, and how can our cur
 rent explosive computational capacity aid the discovery of new Physics?" H
 er research uses computational complexity theory to guide the development 
 of small\, experimental quantum computers\, and brings information and p
 robability theory to bear on issues of device characterization and inferen
 ce in the presence of quantum noise. She is currently a postdoctoral fel
 low at MIT\, having also spent time at the Simons Institute for the Theory
  of Computing\, Harvard University and the Dahlem Center for Complex Qu
 antum Systems in Berlin. She obtained her PhD from Stanford University in
  Jan 2022 and a BS from MIT in 2016. Her research has been recognized by a
  Research Excellence award from IBM\, a Quantum Creators' Prize from the
  University of Chicago and the Quantum Innovator accolade from the Unive
 rsity of Waterloo.\n\nMore information
LOCATION:BC 420 https://plan.epfl.ch/?room==BC%20420 https://epfl.zoom.us/
 j/66802341037
STATUS:CONFIRMED
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