# Prof. Rex Godby - The GW approach to spectral, ground-state and transport proper

Tuesday 25 October 2011, 13:30

####
Prof. Rex Godby, (University of York)

The GW approximation is the first-order term in an expansion of the electronic self-energy operator in powers of the dynamically screened electron-electron interaction, W. From , the one-particle Green's function G may be calculated, from which various spectral and ground-state properties of electrons in matter are available. For transport properties or the optical absorption spectrum, the two-electron Green's function is required, which may also be formulated at the same level of approximation as GW. Key differences between GW-type theories and density-functional theory (in its ground-state and excited-state formulations) will be discussed, and the use of GW approaches to overcome certain limitations of the usual DFT functionals mentioned.

Event type |
Seminar |

Start date and time |
Tuesday 25 October 2011, 13:30 |

End |
Tuesday 25 October 2011, 14:30 |

Location |
CR11, R3 |

Maximum Audience |
24 |