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hep-th1999
The Hamiltonians of Linear Quantum Fields: II. Classically Positive Hamiltonians
Adam D. Helfer
For linear bose field theories, I show that if a classical Hamiltonian function is strictly positive, then there is a canonical transformation making the evolution orthogonal. This…
hep-th1999
The Hamiltonians of Linear Quantum Fields: I. Existence Theory
Adam D. Helfer
For linear scalar field theories, I characterize those classical Hamiltonian vector fields which have self-adjoint operators as their quantum counterparts. As an application, it is…