9 research outputs found
Out of equilibrium correlation functions of quantum anisotropic XY models: one-particle excitations
Full text linkWe 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.Comment: 11 pages, no figures; revtex. Minor changes in the text; list of
refs. modifie
Effects of Melatonin on Gonadal Steroids and Glucose Plasma Levels in Frogs (Rana perezi and Rana temporaria)
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A randomised, double-blind, placebo-controlled, comparative study of topical skin analgesics and the anxiety and discomfort associated with venous cannulation
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