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- W2032737700 abstract "A map of a quantum Heisenberg spin chain into an extended Bose-Hubbard-like Hamiltonian is set up. Within this framework, the spectrum of the corresponding Bose-Hubbard chain, on a periodic one-dimensional lattice containing two, four, and six bosons shows interesting detailed band structures. These fine structures are studied using numerical diagonalization, and nondegenerate and degenerate perturbation theory. We also focus our attention on the effect of the anisotropy and Heisenberg exchange energy on the detailed band structures. The signature of the quantum breather is also set up by the square of the amplitudes of the corresponding eigenvectors in real space." @default.
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- W2032737700 date "2010-04-30" @default.
- W2032737700 modified "2023-09-25" @default.
- W2032737700 title "Quantum signatures of breathers in a finite Heisenberg spin chain" @default.
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- W2032737700 doi "https://doi.org/10.1088/0953-8984/22/20/205502" @default.
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