Keywords:
Quantum field theory.
;
Electronic books.
Description / Table of Contents:
This work provides a systematic introduction to quantum field theory and renormalization group, as applied to particle physics and continuous macroscopic phase transitions.
Type of Medium:
Online Resource
Pages:
1 online resource (1074 pages)
Edition:
5th ed.
ISBN:
9780192571618
Series Statement:
International Series of Monographs on Physics Series ; v.171
URL:
https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=6532347
DDC:
530.143
Language:
English
Note:
Cover -- Quantum Field Theory and Critical Phenomena - Fifth Edition -- Copyright -- Dedication -- Preface -- Acknowledgements -- Some general references for the whole work -- Contents -- 1 Gaussian integrals. Algebraic preliminaries -- 1.1 Gaussian integrals: Wick's theorem -- 1.2 Perturbative expansion. Connected contributions -- 1.2.1 Perturbation theory -- 1.2.2 Connected contributions or cumulants -- 1.3 The steepest descent method -- 1.4 Complex structures and Gaussian integrals -- 1.5 Grassmann algebras. Differential forms -- 1.5.1 Differential forms -- 1.6 Differentiation and integration in Grassmann algebras -- 1.6.1 Differentiation in Grassmann algebras -- 1.6.2 A basis of differential operators -- 1.6.3 Integration in Grassmann algebras -- 1.6.4 Change of variables in a Grassmann integral -- 1.6.5 Mixed change of variables -- 1.7 Gaussian integrals with Grassmann variables -- 1.7.1 General Gaussian integrals -- 1.7.2 Pfaffian and determinant -- 1.8 Legendre transformation -- 2 Euclidean path integrals and quantum mechanics (QM) -- 2.1 Markovian evolution and locality -- 2.2 Statistical operator: Path integral representation -- 2.2.1 Short-time evolution -- 2.2.2 The path integral -- 2.3 Explicit evaluation of a path integral: The harmonic oscillator -- 2.4 Partition function: Classical and quantum statistical physics -- 2.4.1 The quantum partition function -- 2.4.2 Classical and quantum statistical physics -- 2.5 Correlation functions. Generating functional -- 2.5.1 Thermodynamic limit -- 2.5.2 Generating functional of correlation functions -- 2.5.3 Functional differentiation and correlation functions -- 2.6 Harmonic oscillator. Correlation functions and Wick's theorem -- 2.6.1 Correlation functions, Wick's theorem -- 2.6.2 Harmonic oscillator: Paths and square integrable functions -- 2.7 Perturbed harmonic oscillator.
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2.8 Semi-classical expansion -- 2.8.1 Quantum partition function -- 2.8.2 WKB spectrum -- A2 Additional remarks -- A2.1 A useful relation between determinant and trace -- A2.2 The two-point function: An integral representation -- A2.3 Time-ordered products of operators -- 3 Quantum mechanics (QM): Path integrals in phase space -- 3.1 General Hamiltonians: Phase-space path integral -- 3.1.1 Hamiltonian and Lagrangian -- 3.1.2 QM: Path integral for time evolution -- 3.1.3 Separable Hamiltonians: Equivalence -- 3.2 The harmonic oscillator. Perturbative expansion -- 3.2.1 The quantum harmonic oscillator -- 3.2.2 Phase space path integral: Perturbative definition -- 3.3 Hamiltonians quadratic in momentum variables -- 3.3.1 Quantization in a static magnetic field -- 3.3.2 General quadratic Hamiltonians -- 3.3.3 Phase-space formalism: The δ(0) problem -- 3.4 The spectrum of the O(2)-symmetric rigid rotator -- 3.5 The spectrum of the O(N)-symmetric rigid rotator -- A3 Quantization. Topological actions: Quantum spins,magnetic monopoles -- A3.1 Symplectic form and quantization: General remarks -- A3.2 Classical equations of motion and quantization -- A3.3 Topological actions -- A3.3.1 Spin dynamics and quantization -- A3.3.2 Quantization of spin degrees of freedom -- A3.3.3 The magnetic monopole -- 4 Quantum statistical physics: Functional integration formalism -- 4.1 One-dimensional QM: Holomorphic representation -- 4.1.1 Hilbert space of analytic functions -- 4.1.2 Operator kernels -- 4.2 Holomorphic path integral -- 4.2.1 The harmonic oscil -- 4.2.2 Linear coupling to an external source: Generating functional -- 4.2.3 General one-dimensional Hamiltonian -- 4.3 Several degrees of freedom. Boson interpretation -- 4.4 The Bose gas. Field integral representation -- 4.4.1 Matrix density at thermal equilibrium: Fixed number of particles.
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4.4.2 Second quantization. Field integral representation -- 4.4.3 Fock space -- 4.4.4 Hamiltonian in Fock space -- 4.4.5 Kernels of operators and field integral representation -- 4.4.6 The Gaussian model -- 4.4.7 Pair potentials: The example of the δ(x)-function potential -- 4.5 Fermion representation and complex Grassmann algebras -- 4.5.1 Analytic Grassmann functions, scalar product -- 4.5.2 Operator algebra and kernels -- 4.5.3 An example: One state system -- 4.6 Path integrals with fermions -- 4.6.1 Generalization -- 4.7 The Fermi gas. Field integral representation -- 4.7.1 Simple examples -- 4.7.2 Non-relativistic Fermi gas at low temperatures, in one dimension -- 5 Quantum evolution: From particles to non-relativistic fields -- 5.1 Time evolution and scattering matrix in quantum mechanics (QM) -- 5.1.1 Evolution operator and S-matrix -- 5.1.2 One-particle system -- 5.1.3 Path integrals -- 5.2 Path integral and S-matrix: Perturbation theory -- 5.3 Path integral and S-matrix: Semi-classical expansions -- 5.3.1 Path integral and S-matrix -- 5.3.2 One dimension: Semi-classical limit -- 5.3.3 Eikonal approximation and path integral -- 5.4 S-matrix and holomorphic formalism -- 5.4.1 Path integrals -- 5.4.2 Time-dependent force -- 5.5 The Bose gas: Evolution operator -- 5.6 Fermi gas: Evolution operator -- A5 Perturbation theory in the operator formalism -- 6 The neutral relativistic scalar field -- 6.1 The relativistic scalar field -- 6.1.1 Free-field theory and particle-field relation -- 6.1.2 Field integral and Fock's space -- 6.1.3 Hamiltonian and particle number operators -- 6.1.4 Free-field two-point function -- 6.2 Quantum evolution and the S-matrix -- 6.2.1 The S-matrix: Scattering by an external source -- 6.2.2 General interacting theory -- 6.3 S-matrix and field asymptotic conditions.
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6.3.1 The Gaussian integral in an external source and the S-matrix -- 6.3.2 S-matrix elements from correlation functions -- 6.3.3 The φ3 example: Tree approximation -- 6.4 The non-relativistic limit: The ϕ4 QFT -- 6.5 Quantum statistical physics -- 6.5.1 Partition function and correlation functions -- 6.5.2 The problem of infinities or ultraviolet divergences -- 6.5.3 Connected and vertex functions -- 6.5.4 Change of field variables -- 6.5.5 S-matrix and field representation -- 6.6 Källen-Lehmann representation and field renormalization -- 7 Perturbative quantum field theory (QFT): Algebraic methods -- 7.1 Generating functionals of correlation functions -- 7.2 Perturbative expansion. Wick's theorem and Feynman diagrams -- 7.2.1 Gaussian integral and free field theory -- 7.2.2 Perturbative expansion: A compact expression -- 7.2.3 Wick's theorem -- 7.2.4 Feynman diagrams -- 7.3 Connected correlation functions: Generating functional -- 7.3.1 An alternative proof of connectivity -- 7.3.2 Inversion -- 7.4 The example of the ϕ4 QFT -- 7.5 Algebraic properties of field integrals. Quantum field equations -- 7.5.1 Integration by parts and quantum field equations -- 7.5.2 Direct algebraic proof of the quantum field equations -- 7.5.3 The infinitesimal change of variables -- 7.5.4 The choice of the Gaussian measure -- 7.5.5 The functional Dirac δ-function -- 7.6 Connected correlation functions. Cluster properties -- 7.7 Legendre transformation. Vertex functions -- 7.8 Momentum representation -- 7.9 Loop or semi-classical expansion -- 7.9.1 Loop expansion at leading order -- 7.9.2 Order ~ or one-loop contributions -- 7.9.3 Loop expansion at higher orders -- 7.10 Vertex functions: One-line irreducibility -- 7.11 Statistical and quantum interpretation of the vertex functional -- 7.11.1 Interpretation and variational principle.
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7.11.2 Vertex functional and free energy at fixed field time average -- A7 Additional results and methods -- A7.1 Generating functional at two loops -- A7.2 The background field method -- A7.3 Connected Feynman diagrams: Cluster properties -- A7.3.1 Decay of connected Feynman diagrams in Euclidean space -- A7.3.2 Threshold effects -- 8 Ultraviolet divergences: Effective field theory (EFT) -- 8.1 Gaussian expectation values and divergences: The scalar field -- 8.2 Divergences of Feynman diagrams: Power counting -- 8.2.1 UV dimension of fields and interaction vertices -- 8.2.2 Vertex functions: Power counting, superficial degree of divergence -- 8.3 Classification of interactions in scalar quamtum field theories -- 8.3.1 Classification of vertices -- 8.3.2 Classification of field theories -- 8.4 Momentum regularization -- 8.4.1 Effective field theory: Regularization -- 8.4.2 Terms quadratic in the fields with higher derivatives -- 8.4.3 Regulator fields -- 8.5 Example: The φ3d=6 field theory at one-loop order -- 8.5.1 Perturbation theory at one-loop order -- 8.5.2 Analysis of the divergences at one-loop order -- 8.5.3 Universal properties of Yang-Lee's edge singularity -- 8.6 Operator insertions: Generating functionals, power counting -- 8.7 Lattice regularization. Classical statistical physics -- 8.8 Effective QFT. The fine-tuning problem -- 8.8.1 Effective action and perturbative assumption -- 8.8.2 Gaussian renormalization, dimensional analysis -- 8.8.3 The quadratic action and the fine-tuning problem -- 8.9 The emergence of renormalizable field theories -- 8.9.1 Non-renormalizable interactions: The example of four dimensions -- A8 Technical details -- A8.1 Schwinger's proper-time representation -- A8.2 Regularization and one-loop divergences -- A8.3 More general momentum regularizations.
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9 Introduction to renormalization theory and renormalization group (RG).
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