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Workshop - Champs magnétiques et analyse semi-classique

Jeudi, 21 Mai, 2015 - 14:00 - 14:45
Yuri Kordyukov
Институт математики, Уфа
Magnetic wells in dimension three
Résumé:

We will discuss semiclassical asymptotics of the three-dimensional magnetic Laplacian in presence of magnetic confinement. Using generic assumptions on the geometry of the confinement, we exhibit three semiclassical scales and their corresponding effective quantum Hamiltonians, by means of three microlocal normal forms à la Birkhoff. As a consequence, when the magnetic field admits a unique and non degenerate minimum, we are able to reduce the spectral analysis of the low-lying eigenvalues to a one-dimensional $\hbar$-pseudo-differential operator whose Weyl's symbol admits an asymptotic expansion in powers of $\hbar^{\frac1 2}$.

This is joint work with B. Helffer, N. Raymond and S. Vu Ngoc.

Slides

Due to technical problems with the microphone, the sound of this video is completely scrambled, we apologize for this.