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SUMMARY:Archimedeans Talk: Quantum Money without Quantum Memory: Unforgeab
 le Currency in Theory and Practice - Prof. Adrian Kent\, DAMTP
DTSTART:20250321T180000Z
DTEND:20250321T190000Z
UID:TALK229552@talks.cam.ac.uk
CONTACT:Daniel Nguyen
DESCRIPTION:Quantum money was one of the first inventions in quantum infor
 mation technology.\nThe idea is to make money tokens by including some sto
 red quantum states\, whose\ndescription the bank knows but users do not.  
   Intuitively\, these tokens should be\nunforgeable because the quantum no
 -cloning theorem tells us that there is no\npossible way of constructing a
  device that will duplicate unknown quantum states.\nAs I will explain\, t
 hough\, proving this intuition takes rather more work.\nQuantum money is n
 ot currently practical\, because we have no long-term quantum memories. Ho
 wever\, I will describe a recently proposed way of emulating its advantage
 s without quantum memories\, and an experimental demonstration. Interestin
 gly\, this involves re-examining what the advantages of quantum money actu
 ally are\, which requires re-thinking the role of money in space and time.
  \n
LOCATION:Center for Mathematical Sciences\, Lecture room MR2
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