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- W2036096114 abstract "Vacuum and other states are studied by the canonical formalism of quantum field theory. At first we define the physical vacuum by a free vacuum and creation operators of a Fock space, which is constructed from field variables at a fixed time. It is rewitten in such a way that a state obtained by spplying an annihilation operator to the vacuum is equated with the state obtained by applying power series of creation operators to the vacuum. Parameters of this series (β parameters) characterize the vacuum and define new operators which annihilate the physical vacuum. If we consider any state to be represented by power series of adjoint of the new operators applied on the vacuum, we can prove that their coefficients (ρ parameters) are expectation values of field operators. β parameters are determined by the Hamiltonian of the system. A method to obtain them from a given Hamiltonian is shown by simple examples. In our treatment, self-coupled neutral scalar fields are considered in practice." @default.
- W2036096114 created "2016-06-24" @default.
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- W2036096114 date "1965-05-01" @default.
- W2036096114 modified "2023-10-09" @default.
- W2036096114 title "An Approach in the Canonical Formalism of Quantum Field Theory" @default.
- W2036096114 doi "https://doi.org/10.1143/ptp.33.946" @default.
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