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SUMMARY:The angulon quasiparticle: from molecules in superfluids to ultraf
 ast magnetism
DTSTART:20171107T163000
DTEND:20171107T173000
DTSTAMP:20260929T061211Z
UID:987aa788457238246f33414cd82342d5dda9190bf848dde0cdd6cbde
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Mikhail Lemeshko\, Institute of Science and Technology A
 ustria (IST Austria)\nRecently we have predicted a new quasiparticle - the
  angulon - which is formed when a quantum impurity (such as an electron\, 
 atom\, or molecule) exchanges its orbital angular momentum with a many-par
 ticle environment (such as lattice phonons or a Fermi sea) [1\,2].\n\nSoon
  thereafter we obtained strong evidence that angulons do exist\, and are f
 ormed in experiments on molecules trapped inside superfluid helium nanodro
 plets [3]. The angulon theory thereby provided a simple explanation for ex
 perimental data accumulated during last two decades. Moreover\, casting th
 e many-particle problem in terms of angulons amounts to a drastic simplifi
 cation and allows to tackle previously intractable problems related to qua
 ntum dynamics [4].\n\nIn this presentation we will introduce the angulon c
 oncept and discuss novel physical phenomena [1\,5] arising from the angula
 r momentum exchange in quantum many-particle systems. We will describe the
  applications of angulons to modern experiments on quantum impurities and 
 on non-equilibrium magnetism.\n\n[1] R. Schmidt\, M. Lemeshko\, Phys. Rev.
  Lett. 114\, 203001 (2015)\n[2] R. Schmidt\, M. Lemeshko\, Phys. Rev. X 6\
 , 011012 (2016)\n[3] M. Lemeshko\, Phys. Rev. Lett.\, 118\, 095301 (2017)\
 ; Viewpoint: Physics 10\, 20 (2017)\n[4] B. Shepperson\, A. A. Sondergaard
 \, L. Christiansen\, J. Kaczmarczyk\, R. E. Zillich\, M. Lemeshko\, H. Sta
 pelfeldt\, Phys. Rev. Lett. 118\, 203203 (2017)\n[5] E. Yakaboylu\, M. Lem
 eshko\, Phys. Rev. Lett.\, 118\, 085302 (2017)
LOCATION:BCH 2201 https://plan.epfl.ch/?room==BCH%202201
STATUS:CONFIRMED
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