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DTSTART:20190331T030000
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DTSTAMP:20260404T015803Z
UID:1541754000@ist.ac.at
DTSTART:20181109T100000
DTEND:20181109T110000
DESCRIPTION:Speaker: Mikhail Lemeshko\nhosted by Robert Seiringer\nAbstract
 : Angular momentum is a property inherent to a plethora of everyday phenom
 ena\, from spinning top toys to curved football trajectories to rotating p
 lanets and galaxies. In the microscopic world governed by quantum mechani
 cs\, rotations are described by non-commuting operators. This makes the an
 gular momentum theory extremely involved even for very small systems\, suc
 h as a molecule\, an atom\, or an atomic nucleus. Furthermore\, in most e
 xperiments the behavior of quantum particles is inevitably altered by a ma
 ny-body environment of some kind. Just to name a few examples\, molecular 
 rotation — and therefore reactivity — depends on the presence of a sol
 vent\, and electronic angular momentum in solids – the quantum bit of so
 me of the future quantum computers – is coupled to crystal lattice vibra
 tions. If approached in a brute-force fashion\, understanding angular mome
 ntum in such systems is an impossible task\, since a macroscopic (~1023) n
 umber of particles is involved. In my talk I will present a novel techni
 que to deal with angular momentum in quantum many-body systems\, based on 
 the concept of “angulon” quasiparticles. These new quasiparticles were
  theoretically proposed by our group a few years ago\, and were later show
 n to exist in experiments on molecules rotating in superfluid helium. I w
 ill tell you about the peculiar physics of angulons and their potential ap
 plications\, both to chemical processes involving molecules\, as well as t
 o understanding ultrafast magnetic processes required to design next gener
 ation memory registers and switches. 
LOCATION:Raiffeisen Lecture Hall\, ISTA
ORGANIZER:arinya.eller@ist.ac.at
SUMMARY:Mikhail Lemeshko: Quantum angular momentum — from molecules to ul
 trafast magnetism
URL:https://talks-calendar.ista.ac.at/events/1461
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