 Hamiltonian field theory

Hamiltonian field theory is a framework in theoretical physics that extends Hamiltonian mechanics, which is typically used for finite-dimensional systems, to fields, which are infinite-dimensional entities. This approach is particularly useful in the context of classical field theories and quantum field theories. In Hamiltonian mechanics, the state of a system is described by generalized coordinates and momenta, and the evolution of the system is governed by Hamilton's equations.