Mathematics – Analysis of PDEs
Scientific paper
2012-03-14
Mathematics
Analysis of PDEs
34 pages
Scientific paper
We consider the $\mathbf{U}(1)$-invariant nonlinear Klein-Gordon equation in discrete space and discrete time, which is the discretization of the nonlinear continuous Klein-Gordon equation. To obtain this equation, we use the finite-difference scheme of Strauss-Vazquez. We prove that each finite energy solution converges as $\ttd\to\pm\infty$ to the finite-dimensional set of all multifrequency solitary wave solutions of the form $\phi_1 e^{-i\omega t}$, $\phi_1 e^{-i\omega t}+\phi_2 e^{-i(\omega+\pi)t}$, $\phi_1 e^{-i\omega t}+\phi_2 e^{-i(\omega+\pi)t}+\phi_3 e^{-i\omega' t}+\phi_4 e^{-i(\omega'+\pi)t}$, $t\in\mathbb{Z}$, where $\phi_k\in l^2(\mathbb{Z}^n)$, $1\le k\le 4$, and the frequencies $\omega$ and $\omega'$ are real-valued. The components of the solitary manifold corresponding to the solitary waves of the first two types are generically two-dimensional, while the component corresponding to the last type is generically four-dimensional. The attraction to the set of solitary waves is caused by the nonlinear energy transfer from lower harmonics to the continuous spectrum and subsequent radiation. For the proof, we develop the well-posedness for the nonlinear wave equation in discrete space-time, apply the technique of quasimeasures, and also obtain the version of the Titchmarsh convolution theorem for distributions on the circle.
No associations
LandOfFree
Weak attractor of the Klein-Gordon field in discrete space-time interacting with a nonlinear oscillator does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Weak attractor of the Klein-Gordon field in discrete space-time interacting with a nonlinear oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak attractor of the Klein-Gordon field in discrete space-time interacting with a nonlinear oscillator will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-30037