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2015 | 3 | 1 |

Tytuł artykułu

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

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Warianty tytułu

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.

Twórcy

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

Bibliografia

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  • [19] S. Hirata, Tensor contraction engine: abstraction and automated parallel implementation of configuration-interaction, coupled-cluster, and many-body perturbation theories, J. Phys. Chem. A 107 (2003) 9887–9897.
  • [20] I. Lindgren, J. Morrison, Atomic Many–Body Theory, 2nd ed., Springer–Verlag, Berlin, 1986.
  • [21] A. Derevianko, Post-Wick theorems for symbolic manipulation of second-quantized expressions in atomic many-body perturbation theory, J. Phys. B: At. Mol. Opt. Phys. 43 (2010) 074001. [Crossref][WoS]
  • [22] A. Derevianko, Post-wick theorems for symbolic manipulation of second-quantized expressions in atomic many-body perturbation theory, arXiv 0910.3613v1. [WoS]
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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.doi-10_1515_spma-2015-0015
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