Quantum Dynamics with Mean Field Interactions: a New Approach

Details Quantum Dynamics with Mean Field Interactions: a New Approach Quantum Dynamics with Mean Field Interactions: a New Approach

2008-04-23

arxiv.org/abs/0804.3774v1

Physics

Mathematical Physics

11 pages

Scientific paper

10.1007/s10955-008-9570-7

We propose a new approach for the study of the time evolution of a factorized $N$-particle bosonic wave function with respect to a mean-field dynamics with a bounded interaction potential. The new technique, which is based on the control of the growth of the correlations among the particles, leads to quantitative bounds on the difference between the many-particle Schr\"odinger dynamics and the one-particle nonlinear Hartree dynamics. In particular the one-particle density matrix associated with the solution to the $N$-particle Schr\"odinger equation is shown to converge to the projection onto the one-dimensional subspace spanned by the solution to the Hartree equation with a speed of convergence of order 1/N for all fixed times.

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