Out of equilibrium correlation functions of quantum anisotropic XY models: one-particle excitations
Amico, Luigi ; Osterloh, Andreas
arXiv, 0306285 / Harvested from arXiv
Text on arXiv
We calculate exactly matrix elements between states that are not eigenstates of the quantum XY model for general anisotropy. Such quantities therefore describe non equilibrium properties of the system; the Hamiltonian does not contain any time dependence. These matrix elements are expressed as a sum of Pfaffians. For single particle excitations on the ground state the Pfaffians in the sum simplify to determinants.
Publié le : 2003-06-11
Classification:  Condensed Matter - Strongly Correlated Electrons,  High Energy Physics - Theory,  Mathematical Physics,  Nonlinear Sciences - Exactly Solvable and Integrable Systems 
@article{0306285,
     author = {Amico, Luigi and Osterloh, Andreas},
     title = {Out of equilibrium correlation functions of quantum anisotropic XY
  models: one-particle excitations},
     journal = {arXiv},
     volume = {2003},
     number = {0},
     year = {2003},
     language = {en},
     url = {http://dml.mathdoc.fr/item/0306285}
}

Amico, Luigi; Osterloh, Andreas. Out of equilibrium correlation functions of quantum anisotropic XY
  models: one-particle excitations. arXiv, Tome 2003 (2003) no. 0, . http://gdmltest.u-ga.fr/item/0306285/