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Atominstitut Office at Freihaus

Ms. Sonja Schuh
TU Wien, Freihaus, Turm B, 6.OG
Wiedner Hauptstraße 8-10
1040 Wien, Austria
Tel.: +43 1 58801 142101
Fax: +43 1 58801 14299

Opening Hours for Students:
Monday to Friday 9:30-11:30 and 12:30-15:30


Deanery at Freihaus

Faculty of Physics

TU Wien, Freihaus, Turm B, 5. OG
Wiedner Hauptstraße 8-10
1040 Wien, Austria

Decan: Ao.Univ.Prof. Dipl.-Ing. Dr.techn. Helmut Leeb
Responsibility: diploma/doctoral examination, approval for doctoral studies, implementation of curriculum, all matters for master studies of material sciences

Vice Decan: Privatdoz. Dipl.-Ing. Dr.techn. Herbert Balasin
Responsibility: recognition and change of courses, approval for master studies, grants

Solitons - a non-linear wave phenomenon

A soliton is a wave package which travels through a dispersive, non-linear medium and yet preserves its shape while propagating. Two solitons which cross can even survive their collision unscathed.
A wave packet is composed of several, or a range of, frequencies. If the velocity of the wave in the medium is different at different frequencies (so-called dispersion), the package will be deformed and broaden in the course of time. Non-linear effects convert the individual frequencies, of which the wave package consists, in each other. If this happens in such a way that fast frequencies are transformed in slower ones and vice versa, then both effects can be in equilibrium and the wave shape remains unaltered: a soliton.
Solitons were first described in 1834 by the young engineer John Scott Russell. Russell rode several kilometers side by side to water wave, about 10 meters long and half a meter high, which propagated in a narrow scottish channel. He observed that the shape of the wave hardly changed. → Picture