Out of equilibrium correlation functions of quantum anisotropic XY models: one-particle excitations
Abstract
We calculate exactly matrix elements between non-equilibrium excitations of the quantum XY model for general anisotropy. 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.
- Publication:
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Journal of Physics A Mathematical General
- Pub Date:
- January 2004
- DOI:
- 10.1088/0305-4470/37/2/001
- arXiv:
- arXiv:cond-mat/0306285
- Bibcode:
- 2004JPhA...37..291A
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons;
- High Energy Physics - Theory;
- Mathematical Physics;
- Mathematics - Mathematical Physics;
- Nonlinear Sciences - Exactly Solvable and Integrable Systems
- E-Print:
- 11 pages, no figures