scholarly journals Cosmic Structure Formation with Kinetic Field Theory

2019 ◽  
Vol 531 (11) ◽  
pp. 1800446 ◽  
Author(s):  
Matthias Bartelmann ◽  
Elena Kozlikin ◽  
Robert Lilow ◽  
Carsten Littek ◽  
Felix Fabis ◽  
...  
Keyword(s):  
Field Theory ◽  
Structure Formation ◽  
Kinetic Field

scholarly journals Kinetic field theory: cosmic structure formation and fluctuation-dissipation relations

2018 ◽  
Vol 2 (2) ◽  
pp. 025020 ◽  
Author(s):  
Johannes Dombrowski ◽  
Felix Fabis ◽  
Matthias Bartelmann
Keyword(s):  
Field Theory ◽  
Structure Formation ◽  
Fluctuation Dissipation ◽  
Kinetic Field

scholarly journals Kinetic field theory: Non-linear cosmic power spectra in the mean-field approximation

2021 ◽  
Vol 10 (6) ◽  
Author(s):  
Matthias Bartelmann ◽  
Johannes Dombrowski ◽  
Sara Konrad ◽  
Elena Kozlikin ◽  
Robert Lilow ◽  
...  
Keyword(s):  
Field Theory ◽  
Power Spectrum ◽  
Mean Field ◽  
Power Spectra ◽  
Field Approximation ◽  
Density Fluctuations ◽  
Mean Field Approximation ◽  
Non Linear ◽  
Two Parameters ◽  
Kinetic Field

We use the recently developed Kinetic Field Theory (KFT) for cosmic structure formation to show how non-linear power spectra for cosmic density fluctuations can be calculated in a mean-field approximation to the particle interactions. Our main result is a simple, closed and analytic, approximate expression for this power spectrum. This expression has two parameters characterising non-linear structure growth which can be calibrated within KFT itself. Using this self-calibration, the non-linear power spectrum agrees with results obtained from numerical simulations to within typically \lesssim10\,\%≲10% up to wave numbers k\lesssim10\,h\,\mathrm{Mpc}^{-1}k≲10hMpc−1 at redshift z = 0z=0. Adjusting the two parameters to optimise agreement with numerical simulations, the relative difference to numerical results shrinks to typically \lesssim 5\,\%≲5%. As part of the derivation of our mean-field approximation, we show that the effective interaction potential between dark-matter particles relative to Zel’dovich trajectories is sourced by non-linear cosmic density fluctuations only, and is approximately of Yukawa rather than Newtonian shape.

scholarly journals Kinetic field theory: exact free evolution of Gaussian phase-space correlations

2018 ◽  
Vol 2018 (4) ◽  
pp. 043214 ◽  
Author(s):  
Felix Fabis ◽  
Elena Kozlikin ◽  
Robert Lilow ◽  
Matthias Bartelmann
Keyword(s):  
Field Theory ◽  
Phase Space ◽  
Free Evolution ◽  
Kinetic Field

scholarly journals Hydrodynamic transport functions from quantum kinetic field theory

2000 ◽  
Vol 61 (12) ◽  
Author(s):  
E. A. Calzetta ◽  
B. L. Hu ◽  
S. A. Ramsey
Keyword(s):  
Field Theory ◽  
Kinetic Field ◽  
Hydrodynamic Transport

scholarly journals A microscopic, non-equilibrium, statistical field theory for cosmic structure formation

2016 ◽  
Vol 18 (4) ◽  
pp. 043020 ◽  
Author(s):  
Matthias Bartelmann ◽  
Felix Fabis ◽  
Daniel Berg ◽  
Elena Kozlikin ◽  
Robert Lilow ◽  
...  
Keyword(s):  
Field Theory ◽  
Structure Formation ◽  
Statistical Field ◽  
Statistical Field Theory ◽  
Non Equilibrium

scholarly journals Kinetic field theory: effects of momentum correlations on the cosmic density-fluctuation power spectrum

2017 ◽  
Vol 19 (8) ◽  
pp. 083001 ◽  
Author(s):  
Matthias Bartelmann ◽  
Felix Fabis ◽  
Elena Kozlikin ◽  
Robert Lilow ◽  
Johannes Dombrowski ◽  
...  
Keyword(s):  
Field Theory ◽  
Power Spectrum ◽  
Density Fluctuation ◽  
Kinetic Field

scholarly journals Resummed Kinetic Field Theory: general formalism and linear structure growth from Newtonian particle dynamics

2019 ◽  
Vol 2019 (04) ◽  
pp. 001-001 ◽  
Author(s):  
Robert Lilow ◽  
Felix Fabis ◽  
Elena Kozlikin ◽  
Celia Viermann ◽  
Matthias Bartelmann
Keyword(s):  
Field Theory ◽  
Linear Structure ◽  
Particle Dynamics ◽  
Kinetic Field
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