Another formulation of the Wick’s theorem. Farewell, pairing?

• Autorzy: Igor V. Beloussov
• Języki publikacji: EN

Abstrakty

EN

The algebraic formulation of 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, statistical physics, and quantum chemistry by the standard packages of the well known computer algebra systems.

Słowa kluczowe

EN

vacuum expectation value; chronological product; contractions

• Wydawca: De Gruyter Open
• Czasopismo: Special Matrices
• Rocznik: 2015
• Tom: 3
• Numer: 1

Daty

otrzymano

2015-02-19

zaakceptowano

2015-07-02

online

2015-07-28

Twórcy

autor

Igor V. Beloussov

• Institute of Applied Physics, Academy of Sciences of Moldova, 5 Academy Str., Kishinev, 2028, Republic of
  Moldova

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Identyfikatory

DOI

10.1515/spma-2015-0015