Quantum dynamics and Gram's matrix

Details Quantum dynamics and Gram's matrix Quantum dynamics and Gram's matrix

1999-01-18

arxiv.org/abs/math-ph/9901009v2

Physics

Mathematical Physics

LaTeX, 7 pages, 1 PostScript figure, revised, added references

Scientific paper

We propose to analyse the statistical properties of a sequence of vectors using the spectrum of the associated Gram matrix. Such sequences arise e.g. by the repeated action of a deterministic kicked quantum dynamics on an initial condition or by a random process. We argue that, when the number of time-steps, suitably scaled with respect to $\hbar$, increases, the limiting eigenvalue distribution of the Gram matrix reflects the possible quantum chaoticity of the original system as it tends to its classical limit. This idea is subsequently applied to study the long-time properties of sequences of random vectors at the time scale of the dimension of the Hilbert space of available states.

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