Abstracto
- By using the fact that a massless free field can be treated as a collection of independent harmonic oscillators, it is shown that there exists an infinite number of Hamiltonian structures and of Hamiltonian functionals for the massless free field equations. The case of the electromagnetic field and of the Weyl neutrino field are treated explicitly. It is also shown that an n-dimensional isotropic harmonic oscillator admits an infinite number of Hamiltonian (symplectic) structures for n > 1.