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SUMMARY:Junyu Liu (Caltech)
DTSTART:20201130T173000Z
DTEND:20201130T184500Z
DTSTAMP:20260404T132229Z
UID:HET/4
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/HET/4
 /">Quantum computation and "cyberpunkian" quantum field theory</a>\nby Jun
 yu Liu (Caltech) as part of Purdue HET\n\n\nAbstract\nQuantum field theory
  is one of the greatest achievements by human beings in understanding the 
 law of the universe. Almost all subjects in modern physics\, from condense
 d-matter physics to string theory\, are closely related to the development
 s of quantum field theory. However\, established in the infinite dimension
 al Hilbert spaces\, quantum field theory is very hard to study\, especiall
 y when the theory is strongly coupled. This talk is a summary of quantum o
 pportunities for solving quantum field theory theoretically and numericall
 y\, based on a series of works by the speaker and collaborators. Specifica
 lly\, we describe a digital quantum simulation algorithm for simulating do
 main wall scatterings in the 1+1 dimensional quantum field theory\, which 
 could be regarded as a toy version of cosmological false vacuum decay in t
 he real universe\, as an example. We will discuss some potential fundament
 al limitations of classical algorithms\, how quantum computers will help u
 s solve the problem\, and how good quantum computers are (the quantum-exte
 nded Church-Turing Thesis).\n
LOCATION:https://stable.researchseminars.org/talk/HET/4/
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