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SUMMARY:Abdus Salam Colloquium: Aron Wall – How do qubits flow through sp
 acetime?
DESCRIPTION:How do qubits flow through spacetime?\n\nAbstract: I will discu
 ss new developments in our understanding of the holographic principle\, an
 d the way in which it changes our understanding of spacetime.  In this ne
 w picture\, information (qubits) of spcetime are stored not on 3-dimension
 al time slices\, but on 2-dimensional surfaces.  A 3-dimensional slice is
  thus a quantum process\, and 4-dimensional time evolution represents an e
 quivalence of such processes.  However\, in order to recover general rela
 tivity\, the theory that lives on 3-dimensional slices cannot be a normal 
 unitary theory!  Instead\, it exhibits a phase transition\, where at a ce
 rtain point in the spectrum\, the energy eigenvalues become imaginary rath
 er than real.  I will argue that we must accept these imaginary energies\
 , if we want relativistic spacetime physics to emerge from quantum informa
 tion theory.
URL:https://www.imperial.ac.uk/events/198487/abdus-salam-colloquium-aron-wa
 ll/
DTSTART;TZID=Europe/London:20260113T143000
DTEND;TZID=Europe/London:20260113T153000
LOCATION:H503\, Huxley Building\, South Kensington Campus\, Imperial Colleg
 e London\, London\, SW7 2AZ\, United Kingdom
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