535 research outputs found
Killing-Yano tensors and Nambu tensors
We present the conditions when a Killing-Yano tensor becomes a Nambu tensor.
We have shown that in the flat space case all Killing-Yano tensors are Nambu
tensors.
In the case of Taub-NUT metric and Kerr-Newmann metric we found that a
Killing-Yano tensor of order two generate a Nambu tensor of order three.Comment: content enlarged and revised,10 pages LateX, no figures, accepted for
publication in Il Nuovo Ciment
Quantization of Floreanini-Jackiw chiral harmonic oscillator
The Floreanini-Jackiw formulation of the chiral quantum-mechanical system
oscillator is a model of constrained theory with only second-class constraints.
in the Dirac's classification.The covariant quantization needs infinite number
of auxiliary variables and a Wess-Zumino term. In this paper we investigate the
path integral quatization of this model using canonical
formalism. All variables are gauge variables in this formalism. The Siegel's
action is obtained using Hamilton-Jacobi formulation of the systems with
constraints.Comment: 6 pages LaTeX, corrected typos, accepted for publication in Il Nuovo
Cimento
New Fractional Derivatives with Nonlocal and Non-Singular Kernel: Theory and Application to Heat Transfer Model
In this manuscript we proposed a new fractional derivative with non-local and
no-singular kernel. We presented some useful properties of the new derivative
and applied it to solve the fractional heat transfer model.Comment: 8 Pages, The Journal Thermal Science, 201
On fractional derivatives with exponential kernel and their discrete versions
In this manuscript we define the right fractional derivative and its
corresponding right fractional integral with exponential kernel. Then, we
provide the integration by parts formula and we use operator to confirm our
results. The related Euler-Lagrange equations were obtained and one example is
analyzed. Moreover, we formulate and discus the discrete counterparts of our
results
Nambu--Poisson reformulation of the finite dimensional dynamical systems
In this paper we introduce a system of nonlinear ordinary differential
equations which in a particular case reduces to Volterra's system. We found in
two simplest cases the complete sets of the integrals of motion using
Nambu--Poisson reformulation of the Hamiltonian dynamics. In these cases we
have solved the systems by quadratures.Comment: 6 pages, latex, no figure
Integration by parts and its applications of a new nonlocal fractional derivative with Mittag-Leffler nonsingular kernel
In this manuscript we define the right fractional derivative and its
corresponding right fractional integral for the recently introduced nonlocal
fractional derivative with Mittag-Leffler kernel. Then, we obtain the related
integration by parts formula. We use the operator to confirm our results.
The corresponding Euler-Lagrange equations are obtained and one illustrative
example is discussed
On some new properties of fractional derivatives with Mittag-Leffler kernel
We establish a new formula for the fractional derivative with Mittag-Leffler
kernel, in the form of a series of Riemann-Liouville fractional integrals,
which brings out more clearly the non-locality of fractional derivatives and is
easier to handle for certain computational purposes. We also prove existence
and uniqueness results for certain families of linear and nonlinear fractional
ODEs defined using this fractional derivative. We consider the possibility of a
semigroup property for these derivatives, and establish extensions of the
product rule and chain rule, with an application to fractional mechanics.Comment: 22 pages; accepted for publication in Communications in Nonlinear
Science and Numerical Simulatio
Schr\"odinger Equation on Fractals Curves Imbedding in
In this paper we have generalized the quantum mechanics on fractal
time-space. The time is changing on Cantor-set like but space is considered as
fractal curve like Von-Koch curve. The Feynman path method in quantum mechanics
has been suggested on fractal curve. Using -calculus and Feynman
path method we found the Schr\"{e}dinger on fractal time-space. The Hamiltonian
operator and momentum operator has been derived. More, the continuity equation
and the probability density is given in generalized formulation
On the asymptotic integration of a class of sublinear fractional differential equations
We estimate the growth in time of the solutions to a class of nonlinear
fractional differential equations which
includes with for
the case of slowly-decaying coefficients . The proof is based on the triple
interpolation inequality on the real line and the growth estimate reads as
when for . Our
result can be thought of as a non--integer counterpart of the classical Bihari
asymptotic integration result for nonlinear ordinary differential equations. By
a carefully designed example we show that in some circumstances such an
estimate is optimal
On exact solutions of a class of fractional Euler-Lagrange equations
In this paper, first a class of fractional differential equations are
obtained by using the fractional variational principles. We find a fractional
Lagrangian , where and , such that
the following is the corresponding Euler-Lagrange %
\begin{equation}_tD_b^\alpha(_a^cD_t^\alpha) x(t)+ b(t,x(t))(_a^cD_t^\alpha
x(t))+f(t,x(t))=0. \end{equation} % At last, exact solutions for some
Euler-Lagrange equations are presented. In particular, we consider the
following equations % \begin{equation}_tD_b^\alpha(_a^cD_t^\alpha x(t))=\lambda
x(t), (\lambda\in R) \end{equation} %
\begin{equation}_tD_b^\alpha(_a^cD_t^\alpha x(t))+g(t)_a^cD_t^\alpha x(t)=f(t),
\end{equation} where g(t) and f(t) are suitable functions.Comment: 10 pages, LATEX. in press, Nonlinear Dynamic
- …