Toward a Nonequilibrium Green Functions Approach to Diffusion in Strongly Coupled Finite Quantum Systems. Issue 2 (27th November 2014)

• Record Type: Journal Article
• Authors: Bonitz, M.; Schlünzen, N.; Hermanns, S.
• Is Part Of: Contributions to plasma physics. Volume 55:Issue 2/3(2015)
• Page Start: 152
• Page End: 158
• Publication Date: 2014-11-27
• Subjects: Nonequilibrium Green functions -- Hubbard model -- diffusion -- strong coupling; Plasma (Ionized gases) -- Periodicals; Electronic journals; 530.44
• DOI: 10.1002/ctpp.201400065
• Languages: English
• ISSNs: 0863-1042

Abstract

Abstract: Transport properties of strongly correlated quantum systems are of central interest in condensed matter, ultracold atoms and in dense plasmas. There, the proper treatment of strong correlations poses a great challenge to theory. Here, we apply a Nonequilibrium Green Functions approach using a lattice model as a basic system. This allow us to treat a finite spatially inhomogeneous system with an arbitrary nonequilibrium initial state. Placing all particles initially to one side of the system allows for a nonequilibrium study of diffusion. Strong correlation effects are incorporated via T‐matrix selfenergies. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)