Wick's theorem is a method of reducing high-order derivatives to a combinatorics problem. It is named after Italian physicist Gian Carlo Wick. |
| Теорема Вика (в квантовой электродинамике) |  |
Теорема Вика (в квантовой электродинамике) — утверждение, позволяющее вычислять элементы S — матрицы в n порядке теории возмущений.
Теорема Вика была сформулирована и доказана Д. Виком в 1950 г. Википедия
23 нояб. 2018 г. · Wick's Theorem expresses a time-ordered product of fields as a sum of several terms, each of which is a product of contractions of pairs of ... |
Wick's theorem: If all the contractions of operators appearing in the product are numbers, then the average of the product becomes a linear combination of. |
17 авг. 2021 г. · In order to describe Wick's theorem, we need to define a few terms. A contraction of two fields is defined as the difference between the time-. |
Videolar 13 окт. 2023 г. · Wick's theorem gives the practical rule to express a product of creation and destruction operators as a sum of normally ordered terms. It is an ... |
2 мая 2019 г. · Wick's theorem is a very important theorem in Quantum Field Theory used to reduce products of creation and annihilation operators to sums of ... |
Isserlis' theorem or Wick's probability theorem is a formula that allows one to compute higher-order moments of the multivariate normal distribution |
16 февр. 2022 г. · We give a more precise version of the Wick theorem using Hopf algebra notations for chronological products and not for Feynman graphs ... |
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