MQDT study of channel interactions in systems involving 3 non-degenerate and many degenerate closed channels

Quantum current modelling on tri-layer graphene nanoribbons in limit degenerate and non-degenerate

Graphene is determined by a wonderful carrier transport property and high sensitivityat the surface of a single molecule, making them great as resources used in Nano electronic use.TGN is modeled in form of three honeycomb lattices with pairs of in-equivalent sites as {A1, B1},{A2, B2}, and {A3, B3} which are located in the top, center and bottom layers, respectively. Trilayer...

Conductivity Coefficient Modeling in Degenerate and Non-Degenerate Modes on GNSs

Carbon nanoscrolls (CNSs) with tubular structure similar to the open multiwall carbonnanotube have been of hot debate during recent years. Due to its unique property, Graphene Nanoscroll (GNS) have attracted many research groups’ attention and have been used by them. They specially studied on energy storage devices such as batteries and super capacitors. These devices can be schematically...

Many-body theory of degenerate systems

The many-body theory of degenerate systems is described in detail. More generally, this theory applies to systems with an initial state that cannot be described by a single Slater determinant. The double-source (or closed-time-path) formalism of nonequilibrium quantum field theory is used to derive an expression for the average value of a product of interacting fields when the initial state is ...

On the Spectral Properties of Degenerate Non-selfadjoint Elliptic systems of Differential Operators

Many-body theory of degenerate systems: A simple example

Christian Brouder Laboratoire de Minéralogie Cristallographie, CNRS UMR 7590, Universités Paris 6 et 7, IPGP, case 115, 4 place Jussieu, 75252 Paris cedex 05, France. (Dated: February 2, 2008) The hierarchy of Green functions for (quasi)degenerate systems, presented in cond-mat/0308058, is calculated in detail for the case of a system with closed shells plus a single electron in a two-fold dege...