Zobrazeno 1 - 10
of 350
pro vyhledávání: '"Horák, Jan"'
We calculate non-perturbative self-consistent fermionic and bosonic spectral functions of ultra-cold Fermi gases with the spectral functional approach. This approach allows for a direct real-time computation of non-perturbative correlation functions,
Externí odkaz:
http://arxiv.org/abs/2311.16788
Autor:
Eichmann, Gernot, Gómez, Andrés, Horak, Jan, Pawlowski, Jan M., Wessely, Jonas, Wink, Nicolas
We compute the bound state properties of three-dimensional scalar $\phi^4$ theory in the broken phase. To this end, we extend the recently developed technique of spectral Dyson-Schwinger equations to solve the Bethe-Salpeter equation and determine th
Externí odkaz:
http://arxiv.org/abs/2310.16353
We estimate the nuclear saturation density and the binding energy in a nuclear liquid from precision data on the coupling of the four-quark scattering vertex in the vector channel, computed within functional QCD. We show that this coupling is directl
Externí odkaz:
http://arxiv.org/abs/2308.16594
We compute non-perturbative spectral functions in a scalar $\phi^4$-theory in three spacetime dimensions via the spectral functional renormalisation group. This approach allows for the direct, manifestly Lorentz covariant computation of correlation f
Externí odkaz:
http://arxiv.org/abs/2303.16719
Autor:
Horak, Jan, Pawlowski, Jan M., Turnwald, Jonas, Urban, Julian M., Wink, Nicolas, Zafeiropoulos, Savvas
Publikováno v:
Phys.Rev.D 107, 076019 (2023)
We compute the strong coupling constant of Landau gauge QCD in the full complex momentum plane, both directly and via spectral reconstruction. In particular, we consider the Taylor coupling given by the product of ghost and gluon dressing functions.
Externí odkaz:
http://arxiv.org/abs/2301.07785
Publikováno v:
SciPost Phys. 15, 149 (2023)
We calculate the spectral function of light quark flavours in 2+1 flavour vacuum QCD in the isospin-symmetric approximation. We employ spectral Dyson-Schwinger equations and compute the non-perturbative quark propagator directly in real-time, using r
Externí odkaz:
http://arxiv.org/abs/2210.07597
Autor:
Braun, Jens, Chen, Yong-rui, Fu, Wei-jie, Geißel, Andreas, Horak, Jan, Huang, Chuang, Ihssen, Friederike, Pawlowski, Jan M., Reichert, Manuel, Rennecke, Fabian, Tan, Yang-yang, Töpfel, Sebastian, Wessely, Jonas, Wink, Nicolas
We derive renormalised finite functional flow equations for quantum field theories in real and imaginary time that incorporate scale transformations of the renormalisation conditions, hence implementing a flowing renormalisation. The flows are manife
Externí odkaz:
http://arxiv.org/abs/2206.10232
Autor:
Horák, Jan
Title: Evaluation of post-activation potentiation effect on performance indicators of sprint following crouch start Objectives: The main objective of this thesis is to evaluate the influence of post- activation potentiation phenomenon on sprinter ste
Externí odkaz:
http://www.nusl.cz/ntk/nusl-451027
We consider the coupled set of spectral Dyson-Schwinger equations in Yang-Mills theory for ghost and gluon propagators, which gives us access to the ghost and gluon spectral functions. The set-up is used for a systematic analytic evaluation of the co
Externí odkaz:
http://arxiv.org/abs/2202.09333
Autor:
Horak, Jan, Ihssen, Friederike, Papavassiliou, Joannis, Pawlowski, Jan M., Weber, Axel, Wetterich, Christof
Lattice simulations along with studies in continuum QCD indicate that non-perturbative quantum fluctuations lead to an infrared regularisation of the gluon propagator in covariant gauges in the form of an effective mass-like behaviour. In the present
Externí odkaz:
http://arxiv.org/abs/2201.09747