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SUMMARY:Junyu Liu (Caltech)
DTSTART:20201130T173000Z
DTEND:20201130T184500Z
DTSTAMP:20260423T004911Z
UID:HET/4
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HET/4/">Quan
 tum computation and "cyberpunkian" quantum field theory</a>\nby Junyu 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 condensed-matte
 r physics to string theory\, are closely related to the developments of qu
 antum field theory. However\, established in the infinite dimensional Hilb
 ert spaces\, quantum field theory is very hard to study\, especially when 
 the theory is strongly coupled. This talk is a summary of quantum opportun
 ities for solving quantum field theory theoretically and numerically\, bas
 ed on a series of works by the speaker and collaborators. Specifically\, w
 e describe a digital quantum simulation algorithm for simulating domain wa
 ll scatterings in the 1+1 dimensional quantum field theory\, which could b
 e regarded as a toy version of cosmological false vacuum decay in the real
  universe\, as an example. We will discuss some potential fundamental limi
 tations of classical algorithms\, how quantum computers will help us solve
  the problem\, and how good quantum computers are (the quantum-extended Ch
 urch-Turing Thesis).\n
LOCATION:https://researchseminars.org/talk/HET/4/
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