107,510 research outputs found
Lattice Results for the QCD Phase Transition
We discuss recent results for the phase transition in finite-temperature QCD
from numerical (Monte Carlo) simulations of the lattice-regularized theory.
Emphasis is given to the case of two degenerate light-quark flavors. The order
of the transition in this case, which could have cosmological implications, has
not yet been established.Comment: To appear in the Proceedings of the 1st Latin American Workshop on
High Energy Phenomenology, Porto Alegre, Brazil, 1-3 Dec 2005.One figure, 4
page
On the computation of quantum characteristic exponents
A quantum characteristic exponent may be defined, with the same operational
meaning as the classical Lyapunov exponent when the latter is expressed as a
functional of densities. Existence conditions and supporting measure properties
are discussed as well as the problems encountered in the numerical computation
of the quantum exponents. Although an example of true quantum chaos may be
exhibited, the taming effect of quantum mechanics on chaos is quite apparent in
the computation of the quantum exponents. However, even when the exponents
vanish, the functionals used for their definition may still provide a
characterization of distinct complexity classes for quantum behavior.Comment: 11 pages Latex, 4 ps-figures. Phys. Lett. A, to appea
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