14,368 research outputs found
On the Quantum Kinetic Equation in Weak Turbulence
The quantum kinetic equation used in the study of weak turbulence is
reconsidered in the context of a theory with a generic quartic interaction. The
expectation value of the time derivative of the mode number operators is
computed in a perturbation expansion which places the large diagonal component
of the quartic term in the unperturbed Hamiltonian. Although one is not
perturbing around a free field theory, the calculation is easily tractable
owing to the fact that the unperturbed Hamiltonian can be written solely in
terms of the mode number operators.Comment: 12 pages, LATEX, no figures, to appear in Phys. Rev.
A constructive approach to the soliton solutions of integrable quadrilateral lattice equations
Scalar multidimensionally consistent quadrilateral lattice equations are
studied. We explore a confluence between the superposition principle for
solutions related by the Backlund transformation, and the method of solving a
Riccati map by exploiting two kn own particular solutions. This leads to an
expression for the N-soliton-type solutions of a generic equation within this
class. As a particular instance we give an explicit N-soliton solution for the
primary model, which is Adler's lattice equation (or Q4).Comment: 22 page
Sure success partial search
Partial search has been proposed recently for finding the target block
containing a target element with fewer queries than the full Grover search
algorithm which can locate the target precisely. Since such partial searches
will likely be used as subroutines for larger algorithms their success rate is
important. We propose a partial search algorithm which achieves success with
unit probability
Fractional Generalization of Liouville Equations
In this paper fractional generalization of Liouville equation is considered.
We derive fractional analog of normalization condition for distribution
function. Fractional generalization of the Liouvile equation for dissipative
and Hamiltonian systems was derived from the fractional normalization
condition. This condition is considered considered as a normalization condition
for systems in fractional phase space. The interpretation of the fractional
space is discussed.Comment: 9 pages, LaTe
Artificial Neural Networks
Artificial Neural Network is a mathematical model, made in the form of
software or hardware, built on the principle of biological neural networks of living
cells. The neural network is a system of connected processors interacting with each
other. If you compare them with the biological analogue, you will understand that the
artificial network and the network of neurons are almost the same things. These
processors are usually simple (compared to a CPU used in a PC). Each network
processor either receives signals for processing or sent it to other processors. But if
they are connected in a huge network with controlled interaction, these «simple»
processors in large quantities can complete incredibly complicated tasks
Artificial Neural Networks
Artificial Neural Network is a mathematical model, made in the form of
software or hardware, built on the principle of biological neural networks of living
cells. The neural network is a system of connected processors interacting with each
other. If you compare them with the biological analogue, you will understand that the
artificial network and the network of neurons are almost the same things. These
processors are usually simple (compared to a CPU used in a PC). Each network
processor either receives signals for processing or sent it to other processors. But if
they are connected in a huge network with controlled interaction, these «simple»
processors in large quantities can complete incredibly complicated tasks
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