Initial correlated states for the generalized Kadanoff–Baym Ansatz without adiabatic switching-on of interactions in closed systems

Miroslav Hopjan, Claudio Verdozzi

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

Sammanfattning

We reconsider the Generalized Kadanoff–Baym Ansatz (GKBA) approximation for non-equilibrium Green’s functions and extend it to self-consistently define an equilibrium correlated (within GKBA) state in closed systems. The advantage of the proposed prescription is to avoid the preparation of the initial equilibrium correlated state via adiabatic switching-on of the correlations. A simple model system, namely a Hubbard-dimer, is used to illustrate aspects of the computational implementation and performance of the new scheme.

Originalspråkengelska
Sidor (från-till)1939-1948
TidskriftEuropean Physical Journal: Special Topics
Volym227
Nummer15-16
Tidigt onlinedatum2019 jan. 18
DOI
StatusPublished - 2019

Ämnesklassifikation (UKÄ)

  • Den kondenserade materiens fysik

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