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Condensed Matter > Strongly Correlated Electrons

arXiv:cond-mat/0306285 (cond-mat)
[Submitted on 11 Jun 2003 (v1), last revised 15 Dec 2003 (this version, v2)]

Title:Out of equilibrium correlation functions of quantum anisotropic XY models: one-particle excitations

Authors:Luigi Amico, Andreas Osterloh
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Abstract: 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.
Comments: 11 pages, no figures; revtex. Minor changes in the text; list of refs. modified
Subjects: Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph); Exactly Solvable and Integrable Systems (nlin.SI)
Cite as: arXiv:cond-mat/0306285 [cond-mat.str-el]
  (or arXiv:cond-mat/0306285v2 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.cond-mat/0306285
Journal reference: J.Phys.A37:291-302,2004
Related DOI: https://doi.org/10.1088/0305-4470/37/2/001

Submission history

From: Luigi Amico [view email]
[v1] Wed, 11 Jun 2003 15:28:26 UTC (12 KB)
[v2] Mon, 15 Dec 2003 18:05:15 UTC (11 KB)
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