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51+530.145 (1) |
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Fizică (1722) |
SM ISO690:2012 BELOUSSOV, Igor. Let's forget about the pairing. In: Moldavian Journal of the Physical Sciences, 2014, nr. 1-2(13), pp. 121-126. ISSN 1810-648X. |
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Moldavian Journal of the Physical Sciences | |||||
Numărul 1-2(13) / 2014 / ISSN 1810-648X /ISSNe 2537-6365 | |||||
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CZU: 51+530.145 | |||||
Pag. 121-126 | |||||
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Rezumat | |||||
The algebraic formulation of a Wick's theorem that allows one to present the vacuum or thermal averages of the chronological product of an arbitrary number of field operators as a determinant (permanent) of the matrix is proposed. Each element of the matrix is the average of the chronological product of only two operators. This formulation is extremely convenient for practical calculations in quantum field theory and statistical physics by the methods of symbolic mathematics using computers. |
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