Objectif
The main goal of this proposal is to reach
a better mathematical understanding of
the dynamics of quantum mechanical
systems. In particular I plan to work
on the following three projects along
this direction. A. Effective Evolution
Equations for Macroscopic Systems.
The derivation of effective evolution
equations from first principle microscopic
theories is a fundamental task of statistical
mechanics. I have been involved in
several projects related to the derivation
of the Hartree and the Gross-Piteavskii
equation from many body quantum
dynamics. I plan to continue to work on
these problems and to use these results
to obtain new information on the many
body dynamics. B. Spectral Properties
of Random Matrices. The correlations
among eigenvalues of large random
matrices are expected to be independent
of the distribution of the entries. This
conjecture, known as universality, is
of great importance for random matrix
theory. In collaboration with L. Erdos and
H.-T. Yau, we established the validity of
Wigner's semicircle law on
microscopic scales, and we proved the
emergence of eigenvalue repulsion. In
the future, we plan to continue to study
Wigner matrices to prove, on the longer
term, universality. C. Locality Estimates in
Quantum Dynamics. Anharmonic lattice
systems are very important models in
non-equilibrium statistical mechanics.
With B. Nachtergaele, H. Raz, and R.
Sims, we proved Lieb-Robinson type
inequalities (giving an upper bound on
the speed of propagation of signals), for
a certain class of anharmonicity. Next, we
plan to extend these results to a larger
class of anharmonic potentials, and to
apply these bounds to establish other
fundamental properties of the dynamics
of anharmonic systems, such as the
existence of its thermodynamical limit.
Champ scientifique
Appel à propositions
ERC-2009-StG
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Régime de financement
ERC-SG - ERC Starting GrantInstitution d’accueil
8006 ZURICH
Suisse