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SUMMARY:CCSDT+ in Model Solid Systems (Hubbard Model and UEG) - Verena Neu
 feld (University of Cambridge)
DTSTART:20160523T110000Z
DTEND:20160523T114000Z
UID:TALK65617@talks.cam.ac.uk
CONTACT:Alex Thom
DESCRIPTION:My research uses coupled cluster Monte Carlo (CCMC) techniques
  to gain a better understanding of electronic processes in systems such as
  solids. Coupled cluster can give very accurate energies in systems where 
 many electrons interact with each other (it is able to give "chemical accu
 racy") and can be used to calculate features such as activation energies o
 r bond energies accurately. \nTo get an idea of how CCMC behaves in solids
 \, I have looked into two model solid system\, the uniform electron gas an
 d the Hubbard model. This helps understanding what coupled cluster truncat
 ion level is needed to reach a desired accuracy and how the computational 
 difficulty scales with truncation level. \nAt the talk I will present resu
 lts of how the accuracy and computational difficulty vary with truncation 
 level using "shoulder height" and "inefficiency" as measures. 
LOCATION:U203
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