About: Schwinger variational principle

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Schwinger variational principle is a variational principle which expresses the scattering as a functional depending on two unknown wave functions. The functional attains stationary value equal to actual scattering T-matrix. The functional is stationary if and only if the two functions satisfy the Lippmann-Schwinger equation. The development of the variational formulation of the scattering theory can be traced to works of and J. Schwinger in 1940s.

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  • Schwinger variational principle is a variational principle which expresses the scattering as a functional depending on two unknown wave functions. The functional attains stationary value equal to actual scattering T-matrix. The functional is stationary if and only if the two functions satisfy the Lippmann-Schwinger equation. The development of the variational formulation of the scattering theory can be traced to works of and J. Schwinger in 1940s. (en)
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  • Schwinger variational principle is a variational principle which expresses the scattering as a functional depending on two unknown wave functions. The functional attains stationary value equal to actual scattering T-matrix. The functional is stationary if and only if the two functions satisfy the Lippmann-Schwinger equation. The development of the variational formulation of the scattering theory can be traced to works of and J. Schwinger in 1940s. (en)
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  • Schwinger variational principle (en)
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