2:29 p.m.
Hi everyone,
Next Wednesday, 24 May, at 14:30 in D5.01 we're happy to have Sam Kuypers from our
group give a talk at the CQI seminar. Sam will talk about the history of scientific models
of magnetism, and why decoherence plays an important role in their modern understanding.
Title and abstract below.
As always you can join us online at https://meet.jit.si/cqi-demon-M6QW9V7YY.
Looking forward to seeing you there,
Will
Speaker: Sam Kuypers
Title: On Magnets and the Multiverse
Abstract: Imagine a world where refrigerator magnets, compasses, and magnetic storage
devices don't exist. Surprisingly, this is precisely the universe implied by classical
physics: as Bohr and van-Leeuwen demonstrated, a classical system's magnetisation
invariably vanishes to zero in thermodynamic equilibrium.
Hence, quantum models, such as the Heisenberg spin-chain model, were invented to explain
the phenomenon of magnetism. In this talk, I shall explore those models' history and
intricacies. And I shall clarify why those quantum models require decoherence to explain
the structure of magnetic materials.