Base flow field investigation on the S-2 stage

Modified computer program using finite difference method for calculating base flow field and dissipation for Saturn S-2 stag

Inviscid analysis of the plume created by multiple rocket engines. Part II - Description of the computer programs

Computer program for calculation of single jet and five jet interaction regimes associated with multiple rocket engine

Wavepacket reconstruction via local dynamics in a parabolic lattice

We study the dynamics of a wavepacket in a potential formed by the sum of a periodic lattice and of a parabolic potential. The dynamics of the wavepacket is essentially a superposition of ``local Bloch oscillations'', whose frequency is proportional to the local slope of the parabolic potential. We show that the amplitude and the phase of the Fourier transform of a signal characterizing this dynamics contains information about the amplitude and the phase of the wavepacket at a given lattice site. Hence, {\em complete} reconstruction of the the wavepacket in the real space can be performed from the study of the dynamics of the system.Comment: 4 pages, 3 figures, RevTex