Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Pai, Ramesh V."'
We develop a novel approach to understand the phases of one-dimensional Bose-Hubbard models. We integrate the simplicity of the mean-field theory and the numerical power of the density matrix renormalization group method to build an effective numeric
Externí odkaz:
http://arxiv.org/abs/2201.01923
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Akademický článek
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We obtain the excitation spectra of the following three generalized Bose-Hubbard (BH) models: (1) a two-species generalization of the spinless BH model, (2) a single-species, spin-1 BH model, and (3) the extended Bose-Hubbard model (EBH) for spinless
Externí odkaz:
http://arxiv.org/abs/1410.3621
Publikováno v:
Phys. Rev. A 90, 013625 (2014)
We obtain the complete quantum phase diagram of bosons on a two-leg ladder in the presence of attractive onsite and repulsive interchain nearest-neighbor interactions by imposing the onsite three-body constraint. We find three distinct phases; namely
Externí odkaz:
http://arxiv.org/abs/1407.7950
We carry out an extensive study of the phase diagram of the extended Bose Hubbard model, with a mean filling of one boson per site, in one dimension by using the density matrix renormalization group and show that it can have Superfluid (SF), Mott-ins
Externí odkaz:
http://arxiv.org/abs/1403.2315
Publikováno v:
Phys. Rev. A 89, 013615 (2014)
We study a system of hardcore boson on a one-dimensional lattice with frustrated next-nearest neighbor hopping and nearest neighbor interaction. At half filling, for equal magnitude of nearest and next-nearest neighbor hopping, the ground state of th
Externí odkaz:
http://arxiv.org/abs/1309.4412
Publikováno v:
Physical Review A 88, 053625 (2013)
We study a system of hard-core bosons at half-filling in a one-dimensional optical superlattice. The bosons are allowed to hop to nearest and next-nearest neighbor sites producing a zig-zag geometry and we obtain the ground state phase diagram as a f
Externí odkaz:
http://arxiv.org/abs/1307.4053
We carry out an extensive study of the phase diagrams of the extended Bose Hubbard model, with a mean filling of one boson per site, in one dimension by using the density matrix renormalization group and show that it contains Superfluid (SF), Mott-in
Externí odkaz:
http://arxiv.org/abs/1211.5202
Publikováno v:
Phys. Rev. B 87, 174504 (2013)
We study hardcore bosons on a triangular ladder at half filling in the presence of a frustrating hopping term and a competing nearest neighbor repulsion $V$ which promotes crystallization. Using the finite-size density-matrix renormalization group me
Externí odkaz:
http://arxiv.org/abs/1210.7323