We consider the Hubbard chain in a magnetic field and chemical potential. We introduce a pseudohole basis where all states are generated from a single reference vacuum. This allows the evaluation for all sectors of Hamiltonian symmetry of the model of the expression of the σ electron and hole operators at Fermi momentum ±k F σ and vanishing excitation energy in terms of pseudohole operators. In...

Submitted for the MAR11 Meeting of The American Physical Society Spin-orbit interaction in quantum Monte Carlo LUBOS MITAS, North Carolina State University, RENE DERIAN, Institute of Physics, Slovak Academy of Sciences, SHI GUO, North Carolina State University — For spinless Hamiltonians (ie, no explicit spin operators), real space quantum Monte Carlo (QMC) methods such as variational and fixed...

The response of glaciers to changing climate is explored with an atmosphere/glacier hierarchical modeling approach, in which global simulations are downscaled with an Arctic MM5 regional model which provides temperature and precipitation inputs to a glacier mass-balance model. Themass balances of Hubbard and Bering Glaciers, south-central Alaska, USA, are simulated for October 1994–September 20...

we study the coherent spin-polarized transport through a zigzag-edge graphene flake (zgf), using hubbard model in the nearest neighbor approximation within the framework of the green function’s technique and landauer formalism. the system considered consists of electrode/ (zgf)/electrode, in which the electrodes are chosen to be armchair nanoribbons. the study was performed for two types of ele...

Degenerate Hubbard models are studied using the Generalized-GutzwillerApproximation. It is found that the metal-insulator transition occurs at a finite correlation Uc when the average number of electrons per lattice site is an integer. The critical Uc depends sensitively on both the band degeneracy N and the filling x. A derivation is presented for the general expression of Uc(x,N) which reprod...

We present a full analytical solution of the multiconfigurational strongly correlated mixed-valence problem corresponding to the N-Hubbard ring filled with N-1 electrons, and infinite on-site repulsion. While the eigenvalues and the eigenstates of the model are known already, analytical determination of their degeneracy is presented here for the first time. The full solution, including degenera...

The Hubbard model, a lattice model for spin 1/2 fermions with nearest neighbor “hopping”and an on-site repulsion, plays a special role in condensed matter physics. It is the simplest theoretical model describing correlated electronic systems. Originally introduced to describe the effects of screened Coulomb interaction in narrow band materials, the Hubbard model defined on square lattice gains ...

We present the multi-band dual triply irreducible local expansion (D-TRILEX) approach to interacting electronic systems and discuss its numerical implementation. This method is designed for a self-consistent description of multi-orbital that can also have several atoms in unit cell. The current implementation D-TRILEX able account frequency- channel-dependent long-ranged interactions. show our ...

We introduce a unary coding of bosonic occupation states based on the famous balls and walls counting for number configurations $N$ indistinguishable particles $L$ distinguishable sites. Each state is represented by an integer with human readable bit string that has compositional structure allowing efficient application operators locally modify bosons. By exploiting translational inversion symm...

In this paper an overview of some recent developments on the classical limit and spontaneous symmetry breaking (SSB) in algebraic quantum theory is given. such works, based C∗-algebras, concept has been formalized a complete manner. Additionally, since setting allows for commutative as well non-commutative hence theories, it provides excellent framework to study SBB emergent phenomenon when tra...