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We report studies on the influence of a time-dependent external driving fields of the photons on a quantum system described by Hubbard model with long - range interactions. Through the exact ...
bound for the average energy of the t - J model is found. The upper bounds for the spin - spin and the electron pairing correlation functions in the t - J model as well as in the Hubbard model with bond ...
. This symmetry algebra contains the pairing algebra as a subalgebra which is used to show that the model exhibits Off-Diagonal Long - Range Order in any number of dimensions. A new model for correlated electrons ...
investigate the effect of non-Hermitian imaginary hoppings on the attractive Hubbard model . The exact bound- pair solution shows that the electron - electron correlation suppresses the non-Hermiticity, resulting ...
excitation has a small energy gap. Moreover, the electron pair - pair correlation has a quasi- long - range behavior, indicating an instability of superconductivity even at half-filling. As a comparison, the same ...
controlled calculation. Here we report a density-matrix renormalization-group (DMRG) study of an effective t-J-V model , which is equivalent to the Holstein- Hubbard model in a strong-coupling limit, on long two ...
of magnetic ordering and condensation of superconducting electron pairs in one and two dimensions for finite temperatures. KEY WORDS: Hubbard model ; ODLRO; superconducting correlations ; gauge symmetry ...
momentums, especially at (). Simultaneously, it was found that the on-site nematic interaction suppresses the antiferromagnetic order and long - range electron pairing correlations for dominant pairing ...
An interaction between two heavy electrons mediated by two light electrons is investigated within the asymmetric Hubbard model on a square cluster with sites. The pair correlation function ...
Abstract: Pairing of fermions lies at the heart of superconductivity, the hierarchy of nuclear binding energies and superfluidity of neutron stars. The Hubbard model of attractively interacting ...
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