Jonas Wessely
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View article: The causal structure of the quark propagator
The causal structure of the quark propagator Open
We study the causal structure of the quark propagator with the spectral DSE. The spectral gap equation is solved with the input of the spectral representation of the gluon and a causal STI-construction for the quark-gluon vertex. The latte…
View article: Critical scaling for spectral functions
Critical scaling for spectral functions Open
We study real-time scalar $$\phi ^4$$ -theory in 2+1 dimensions near criticality. Specifically, we compute the single-particle spectral function and that of the s -channel four-point function in and outside the scaling regime. The comp…
View article: Critical scaling for spectral functions
Critical scaling for spectral functions Open
We study real-time scalar $ϕ^4$-theory in 2+1 dimensions near criticality. Specifically, we compute the single-particle spectral function and that of the $s$-channel four-point function in and outside the scaling regime. The computation is…
View article: The causal structure of the quark propagator
The causal structure of the quark propagator Open
We study the causal structure of the quark propagator with the spectral DSE. The spectral gap equation is solved with the input of the spectral representation of the gluon and a causal STI-construction for the quark-gluon vertex. The latte…
View article: Scalar spectral functions from the spectral functional renormalization group
Scalar spectral functions from the spectral functional renormalization group Open
We compute spectral functions in a scalar ϕ4-theory in three spacetime dimensions via the spectral functional renormalization group. This approach allows for the direct, manifestly Lorentz covariant computation of correlation functions in …
View article: Bound states from the spectral Bethe-Salpeter equation
Bound states from the spectral Bethe-Salpeter equation Open
We compute the bound state properties of three-dimensional scalar ϕ4 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 determi…
View article: Bound states from the spectral Bethe-Salpeter equation
Bound states from the spectral Bethe-Salpeter equation Open
We compute the bound state properties of three-dimensional scalar $ϕ^4$ 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 dete…
View article: Renormalised spectral flows
Renormalised spectral flows Open
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…
View article: Scalar spectral functions from the spectral fRG
Scalar spectral functions from the spectral fRG Open
We compute non-perturbative spectral functions in a scalar $ϕ^4$-theory in three spacetime dimensions via the spectral functional renormalisation group. This approach allows for the direct, manifestly Lorentz covariant computation of corre…
View article: Report on 2206.10232v2
Report on 2206.10232v2 Open
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 …
View article: Renormalised spectral flows
Renormalised spectral flows Open
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…