The Cauchy Problem for a Forced Harmonic Oscillator

Details The Cauchy Problem for a Forced Harmonic Oscillator The Cauchy Problem for a Forced Harmonic Oscillator

2007-07-12

arxiv.org/abs/0707.1902v8

Physics

Mathematical Physics

30 pages, 1 figure

Scientific paper

We construct an explicit solution of the Cauchy initial value problem for the one-dimensional Schroedinger equation with a time-dependent Hamiltonian operator for the forced harmonic oscillator. The corresponding Green function (propagator) is derived with the help of the generalized Fourier transform and a relation with representations of the Heisenberg-Weyl group N(3) in a certain special case first, and then is extended to the general case. A three parameter extension of the classical Fourier integral is discussed as a by-product. Motion of a particle with a spin in uniform perpendicular magnetic and electric fields is considered as an application; a transition amplitude between Landau levels is evaluated in terms of Charlier polynomials. In addition, we also solve an initial value problem to a similar diffusion-type equation.

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