Quantum breathers in an attractive fermionic Hubbard model

Details Quantum breathers in an attractive fermionic Hubbard model Quantum breathers in an attractive fermionic Hubbard model

2003-10-29

arxiv.org/abs/nlin/0310043v1

Nonlinear Sciences

Pattern Formation and Solitons

16 pages, 9 figures

Scientific paper

In one-dimensional translationally invariant anharmonic lattices, an extended Bloch state with two or more strongly correlated particles is usually called a quantum breather. Here we study an attractive fermionic Hubbard model with two kind of particles of opposite spin. We discuss the existence of breathers, and several effects that break the translational symmetry of the system and localize the breather in the lattice.

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