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SUMMARY:Stochastic Coupled Cluster in Model Solid Systems - Verena Neufeld
  (University of Cambridge)
DTSTART:20161028T112000Z
DTEND:20161028T114000Z
UID:TALK68026@talks.cam.ac.uk
CONTACT:Lisa Masters
DESCRIPTION:I use stochastic coupled cluster techniques to gain a better u
 nderstanding of electronic processes\nin solids. Coupled cluster can give 
 very accurate energies in systems where many electrons interact\nwith each
  other (it is able to give ”chemical accuracy”). Coupled cluster can b
 e made as accurate but\nexpensive as desired by including more excitations
  from the reference Slater determinant directly.\nI refer to these differe
 nt levels of accuracy as ”truncation levels”.\nBefore I will eventuall
 y consider realistic solids\, I have studied two model solid system so far
 \,\nthe uniform electron gas and the Hubbard model. These studies indicate
  how truncation levels of\ncoupled cluster perform with varying strength o
 f electron correlation in solid systems.\nIn the talk I will focus on the 
 uniform electron gas and present stochastic coupled cluster results\nat di
 fferent truncation levels and correlation to determine the required trunca
 tion levels. I will also\ndiscuss the calculation performance with more tr
 uncation levels and correlation.
LOCATION:Unilever Lecture Theatre\,  Department of Chemistry
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