Physics – Mathematical Physics
Scientific paper
2011-01-08
Physics
Mathematical Physics
23 pages
Scientific paper
We consider on a symplectic manifold M with Poisson bracket {,} an Hamiltonian H with complete flow and a family Phi=(Phi_1,...,Phi_d) of observables satisfying the condition {{Phi_j,H},H}=0 for each j. Under these assumptions, we prove a new formula relating the time evolution of localisation observables defined in terms of Phi to the variation of energy along classical orbits. The correspondence between this formula and a formula established recently in the framework of quantum mechanics is put into evidence. Among other examples, our theory applies to Stark Hamiltonians, homogeneous Hamiltonians, purely kinetic Hamiltonians, the repulsive harmonic potential, the simple pendulum, central force systems, the Poincare ball model, covering manifolds, the wave equation, the nonlinear Schroedinger equation, the Korteweg-de Vries equation and quantum Hamiltonians defined via expectation values.
de Aldecoa Rafael Tiedra
Gournay Antoine
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