Are particles quantized perturbations of some underlying fields?

 

Are particles quantized perturbations of some underlying fields?

In classical field theory, the fields behave to minize the action – integral of the lagrangian. Does the minimal action formalism hold when the fields are quantum operators? If so, it dictakes how a field operator should evolve with time?

Can the evolution of a state with time be expressed in a minimal action formalism?

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