13 citations · 55 across the 18 of their papers we have counts for
18 papers
Assisted fusion
German Kälbermann
A model of nuclear fusion consisting of a wave packet impinging into a well located between square one dimensional barriers is treated analytically. The wave function inside the we…
Decay of a square pulse to Sine-Gordon breathers
G. Ka"lbermann
We investigate numerically and analytically the existence of thresholds for the production of Sine-Gordon single and multiple breathers from simple initial pulses.
Stationary finger solutions in the Hele-Shaw cell
G. Ka"lbermann, R. Wallach
We solve numerically the nonlinear differential equation for the Hele-Shaw, Saffman-Taylor problem derived in the preceding work. Stationary solutions with no free phenomenological…
A differential equation for the Saffman-Taylor finger
G. Ka"lbermann
We develop a stream function approach for the horizontal Hele-Shaw, Saffman-Taylor finger. The model yields a nonlinear time-dependent differential equation. The finger widths deri…
The Sine-Gordon Wobble
German Ka"lbermann
Nonperturbative, oscillatory, winding number one solutions of the Sine-Gordon equation are presented and studied numerically. We call these nonperturbative shape modes {\sl wobble}…
Ehrenfest theorem, Galilean invariance and nonlinear Schrödinger equations
G. Kälbermann
Galilean invariant Schrödinger equations possessing nonlinear terms coupling the amplitude and the phase of the wave function can violate the Ehrenfest theorem. An example of this…