Browsing by Subject "Density matrix renormalization group"

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Disorder and superconductivity in doped semiconductor nanotubes

Shirakawa, T.; Nishimoto, S.; Ohta, Y.; Fukuyama, H. (Bristol : IOP Publishing Ltd., 2009)

Finite-size systems of the one-dimensional attractive Hubbard model with random potential are studied as an effective model for doped semiconductor nanotubes. We calculate the binding energy of Cooper pairs and pair ...
Nonquasiparticle states in the half-metallic ferromagnet simulated by the two-band Hubbard model

Nakano, K.; Shirakawa, T.; Ohta, Y. (Bristol : IOP Publishing Ltd., 2010)

The density-matrix renormalization group method is used to study the three-band zigzag ladder model that simulates the electronic state of the t 2g-orbital system of the double string of the edge-shared CrO 6 octahedra in ...
Symmetry-broken states in a system of interacting bosons on a two-leg ladder with a uniform Abelian gauge field

Greschner, Sebastian; Piraud, M.; Heidrich-Meisner, F.; McCulloch, I.P.; Schollwöck, U.; Vekua, T. (College Park, MD : American Physical Society, 2016)

We study the quantum phases of bosons with repulsive contact interactions on a two-leg ladder in the presence of a uniform Abelian gauge field. The model realizes many interesting states, including Meissner phases, vortex ...

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