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SUMMARY:Quantum transport beyond the independent-electron approximation - 
 Prof. Rex Godby\, University of York
DTSTART:20100114T141500Z
DTEND:20100114T151500Z
UID:TALK19107@talks.cam.ac.uk
CONTACT:Dr Jonathan Keeling
DESCRIPTION:I shall present two approaches to including the electron-elect
 ron\ninteraction in theoretical descriptions of quantum transport of\nelec
 trons through extended leads which connect a central device to\nreservoirs
 .  For the steady-state response to small applied voltages\,\nthe conducta
 nce may be written exactly in terms of the density\nresponse function\, wh
 ich in turn may be directly calculated using\nmany-body perturbation theor
 y or time-dependent density-functional\ntheory (TDDFT) [1].  For the respo
 nse (transient or steady-state) to\nthe application of larger voltages\, w
 e introduce the construction of a\nstroboscopic wavepacket basis set\, fac
 ilitating physically transparent\nand numerically efficient calculations [
 2].\n\nfn1. _Ab-initio formulation of the 4-point conductance of interacti
 ng electronic systems_\, P. Bokes\, J. Jung and R.W. Godby\, _Phys. Rev. B
 _ *76*\n125433 (2007)\; M. Verstraete\, P. Bokes and R.W. Godby\, _J. Chem
 . Phys._\n*130* 124715 (2009) .\n\nfn2. _Stroboscopic wavepacket descripti
 on of non-equilibrium many-electron problems_\, P. Bokes\, F. Corsetti and
  R. W. Godby\, _Phys. Rev. Lett._ *101* 046402 (2008).\n
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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