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## Details

Genre/Form: | Electronic books |
---|---|

Additional Physical Format: | Print version: Perturbation theory. Hauppauge, New York : Nova Science Publishers, Inc., [2018] (DLC) 2017058086 |

Material Type: | Document, Internet resource |

Document Type: | Internet Resource, Computer File |

All Authors / Contributors: |
Zossima Pirogov |

ISBN: | 9781536129908 1536129909 |

OCLC Number: | 1019838362 |

Description: | 1 online resource. |

Contents: | Exchange perturbation theory / Elena V. Orlenko (Department of Theoretical Physics, Peter the Great St. Petersburg Polytechnic University, Saint-Petersburg, Russia) -- Itinerant spin fluctuations in iron-based superconductors / Maxim M. Korshunov (Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia) -- Chiral perturbation theory and nuclear forces / R. Machleidt (Department of Physics, University of Idaho, Moscow, Idaho, USA) -- Perturbative expansions in QCD improved by conformal mappings of the borel plane / Irinel Caprini, Jan Fischer, Gauhar Abbas, B. Ananthanarayan (National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania, and others) -- One-loop corrections in the large-Nc heavy baryon chiral perturbation theory / María A. Hernández-Ruiz (Unidad Académica de Ciencias Quý́micas, Universidad Autónoma de Zacatecas, Apartado Postal, Zacatecas, México). |

Series Title: | Physics research and technology. |

Responsibility: | Zossima Pirogov, editor. |

### Abstract:

"Perturbation Theory: Advances in Research and Applications begins with a deliberation on the development of a formalism of the Exchange perturbation theory (EPT) that accounts for the general identity principle of electrons that belong to different atomic centres. The possible applications of the theory concerning scattering and collision problems are discussed, and the authors apply the TDEPT to the description of the positron scattering on a Lithium atom as an example. Next, spin fluctuations in metallic multiband systems are discussed, including how to calculate the effect of itinerant spin excitations on the electronic properties and formulate a theory of spin fluctuation-induced superconductivity. The function of spin-orbit coupling is emphasized. Following this, the authors review how, governed by chiral symmetry, the long- and intermediate-range parts of the $NN$ potential unfold order by order, proceeding up to sixth order where convergence is achieved. Perturbative and nonperturbative approaches to nuclear amplitude are discussed, including the implications for renormalization. Continuing, this book presents proof of the good convergence properties of the new expansions on mathematical models that simulate the physical polarization function for light quarks and its derivative (the Adler function), in various prescriptions of renormalization-group summation. An overview of the calculation of one-loop corrections to the baryon axial vector current in the large-Nc heavy baryon chiral perturbation theory is offered, where Nc is the number of color charges. The matrix elements of the space components of the renormalization of the baryon axial vector current between SU(6) symmetric states yield the values of the axial vector couplings"--

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