Abstract
The sensitivity of the eigenvalues Ei of a non-integrable Hamiltonian measured by their second differences or second derivatives d2Ei/dλ2 with respect to a coupling parameter λ is studied for the regular and the irregular part of the spectrum as well as for the range of isolated avoided crossings. In the regular part the d2Ei/dλ2 values are expected to be arranged on branches in a plot versus energy: in the avoided-crossing range there should be a drastic increase, and for the irregular part a decrease and a breakdown of the branching is predicted.
Original language | English |
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Pages (from-to) | 252-256 |
Number of pages | 5 |
Journal | Chemical Physics Letters |
Volume | 120 |
Issue number | 3 |
DOIs | |
State | Published - 11 Oct 1985 |