Over the last twenty years\, physicists have learned to
manipulate individual quantum objects: atoms\, ions\, molecules\, qua
ntum circuits\, electronic spins... It is now possible to build "atom
by atom" a synthetic quantum matter. By controlling the interactions b
etween atoms\, one can study the properties of these elementary many-b
ody systems: quantum magnetism\, transport of excitations\, supercondu
ctivity... and thus understand more deeply the N-body problem. More re
cently\, it was realized that these quantum machines may find applicat
ions in the industry\, such as finding the solution of combinatorial o
ptimization problems.
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\nThis seminar will present an examp
le of a synthetic quantum system\, based on laser-cooled ensembles of
individual atoms trapped in microscopic optical tweezer arrays. By exc
iting the atoms into Rydberg states\, we make them interact\, even at
distances of more than ten micrometers. In this way\, we study the mag
netic properties of an ensemble of more than a hundred interacting ½
spins\, in a regime in which simulations by usual numerical methods ar
e already very challenging. Some aspects of this research led to the c
reation of a startup\, Pasqal.
This event starts at 3:30p m with refreshments\, followed at 3:45pm by a short presentation by At harva Vidwans (MSPQC student Micheline Soley group) titled "qDRIVE: A Variational Quantum Eigensolver for Resonance Identification on Near-T erm Computers". The invited presentation starts at 4pm.
\n URL:https://www.physics.wisc.edu/events/?id=8400 END:VEVENT END:VCALENDAR