Self-Induced Dipole Force and Filamentation Instability of a Matter Wave
نویسنده
چکیده
The interaction of copropagating electromagnetic and matter waves is described with a set of coupled higher-order nonlinear Schrödinger equations. Optical self-focusing modulates an initially planar wave leading to the generation of dipole forces on the atoms. Atomic channeling due to the dipole forces leads, in the nonlinear regime, to filamentation of the atomic beam. Instability growth rates are calculated for atomic beams with both low and high phase space densities. In one transverse dimension an exact solution is found that describes a coupled optical and atomic soliton. [S0031-9007(98)06469-2]
منابع مشابه
Fluid description of collisional current filamentation instability of a weakly ionized plasma in the presence of magnetic field
In this paper, the collisional filamentation instability of an electron beam-weakly magnetized and ionized plasma has been investigated in the presence of background plasma, using the fluid description. By describing the equilibrium configuration in the presence of binary collision terms between charged and neutral particles and using the local approximation method, the dispersion relation (DR)...
متن کاملEigenmodes and growth rates of relativistic current filamentation instability in a collisional plasma.
I theoretically found eigenmodes and growth rates of relativistic current filamentation instability in collisional regimes, deriving a generalized dispersion relation from self-consistent beam-Maxwell equations. For symmetrically counterstreaming, fully relativistic electron currents, the collisional coupling between electrons and ions creates the unstable modes of growing oscillation and wave,...
متن کاملDipole Interactions in Nanosystems
The dipole-dipole interaction influences nanoscopic matter by fixing the patterns of permanent, displacive, and induced dipole moments, subject to constraints of molecular size and other short range interactions. Prediction of these arrangements is a challenging problem. The eigenvector of maximum eigenvalue of the dipole-dipole interaction matrix can provide insights and sometimes a complete s...
متن کاملInvestigation of the vdW Force-Induced Instability in Nano-scale Actuators Fabricated form Cylindrical Nanowires
The presence of van der Waals (vdW) force can lead to mechanical instability in freestanding nano-scale actuators. Most of the previous researches in this area have exclusively focused on modeling the instability in actuators with one actuating components. While, less attention has been paid to actuators consist of two actuating components. Herein, the effect of the vdW force on the instability...
متن کاملStability of Self-Focused Filaments in Laser-Produced Plasmas
LLE Review, Volume 80 191 The filamentation instability causes local intensity maxima in a laser beam propagating through a plasma to self-focus to high intensities. This process can affect many aspects of the beam propagation and absorption, so it has long been a subject of interest in laser–plasma interaction research. The theoretical thresholds and growth rates for the linear phase of the fi...
متن کامل