Kinetic field theory: higher-order perturbation theory
We give a detailed exposition of the formalism of kinetic field theory (KFT) with emphasis on the perturbative determination of observables. KFT is a statistical nonequilibrium classical field theory based on the path integral formulation of classical mechanics, employing the powerful techniques dev...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 September 2022
|
| In: |
Physical review
Year: 2022, Jahrgang: 106, Heft: 6, Pages: 1-35 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.106.063513 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1103/PhysRevD.106.063513 Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.106.063513 
|
| Verfasserangaben: | Lavinia Heisenberg and Shayan Hemmatyar, Institute for Theoretical Physics, Heidelberg University, Stefan Zentarra, Institute for Theoretical Physics, ETH Zurich |
| Zusammenfassung: | We give a detailed exposition of the formalism of kinetic field theory (KFT) with emphasis on the perturbative determination of observables. KFT is a statistical nonequilibrium classical field theory based on the path integral formulation of classical mechanics, employing the powerful techniques developed in the context of quantum field theory to describe classical systems. Unlike previous work on KFT, we perform the integration over the probability distribution of initial conditions in the very last step. This significantly improves the clarity of the perturbative treatment and allows for physical interpretation of intermediate results. We give an introduction to the general framework, but focus on the application to interacting N-body systems. Specializing the results to cosmic structure formation, we reproduce the linear growth of the cosmic density fluctuation power spectrum on all scales from microscopic, Newtonian particle dynamics alone. |
|---|---|
| Beschreibung: | Gesehen am 25.09.2023 |
| Beschreibung: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.106.063513 |