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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-693@lptms.universite-paris-saclay.fr
DTSTART:20191008T110000Z
DTEND:20191008T120000Z
DTSTAMP:20191002T085529Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-sylvain-nascimbene-lkb/
SUMMARY:Séminaire du LPTMS: Sylvain Nascimbène (LKB) - Salle des séminai
 res du FAST et du LPTMS\, bâtiment Pascal n°530 - 8 Oct 19 11:00
DESCRIPTION:Synthetic quantum Hall system with ultracold Dysprosium atoms\n
 Sylvain Nascimbène (LKB)\nA quantum Hall system is characterized by the q
 uantization of its Hall conductance\, and its robustness with respect to m
 aterial imperfections. In solid states devices disorder induces strong inh
 omogeneities in the Hall current distribution\, making the connection with
  simple disorder-free models challenging. In this talk I will present the 
 realization of a synthetic quantum Hall system using ultracold atoms of Dy
 sprosium\, in which a synthetic dimension is encoded in the electronic spi
 n J=8. Dynamics in this dimension is induced by laser-induced spin couplin
 gs\, and the Doppler effect occuring in these processes leads to a spin-or
 bit coupling\, interpreted as an artificial magnetic field. We show that o
 ur system reproduces several characteristic features of Landau levels. We 
 observe a clear distinction between bulk states -- with inhibited motion d
 ue to limited energy dispersion -- and edge modes\, free to move in one di
 rection only. We also probe the system excitations\, via the measurement o
 f cyclotron and skipping orbits. We finally probe the Hall response of the
  system\, and make the connection to topological properties of the lowest 
 energy band. 
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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