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UID:0-981@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20240920T134500
DTEND;TZID=Europe/Paris:20240920T150000
DTSTAMP:20240918T080753Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/informal-quantum-
 seminar-arabi-seshappan-ucla/
SUMMARY:Informal Quantum Seminar: Arabi Seshappan (UCLA) - Salle des sémin
 aires du FAST et du LPTMS\, bâtiment Pascal n°530 - 20 Sep 24 13:45
DESCRIPTION:Excited State Structure of Defected Solids (Co@S:WS2 and Si G-C
 enter) through GW/Bethe Salpeter Equation (GW/BSE) Approaches\nArabi Sesha
 ppan (UCLA)\n&nbsp\;\n\nDefects in solid state materials have been identif
 ied as candidates for application in quantum information science (QIS) as 
 single photon emitters\, quantum light sources\, and room-temperature soli
 d-state quantum bits (qubits). Accurate calculations of the exciton (coupl
 ed electron-hole pair) interactions in these materials is imperative to un
 derstanding these applications. In this work I study the ground- and excit
 ed-state energies for 2 promising QIS defected-solid candidates\, using th
 e many-body perturbation theory of the GW approximation and the Bethe-Salp
 eter Equation (BSE) approach. I show initial results of vertical excitatio
 n energies for monolayer cobalt-at-sulfur-site substituted WS2 (Co@S:WS2)\
 , using a novel method of Spin-Flip on BSE [arXiv:2207.04549]. I will also
  discuss preliminary calculations of optical spectra of the Si G-center de
 fect—diamond structure Si with a C-Si-C substitution—using conventiona
 l GW/BSE through the open-source code BerkeleyGW. These defected structure
 s are of particular interest due to their ease of fabrication and emission
 s compatibility with current optical fiber/ telecommunications infrastruct
 ure.
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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