255 citations · 2.2k across the 138 of their papers we have counts for
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Unstable Modes and Confinement in the Lattice Schrödinger Functional Approach
Paolo Cea, Leonardo Cosmai
We analyze the problem of the Nielsen-Olesen unstable modes in the SU(2) lattice gauge theory by means of a recently introduced gauge-invariant effective action. We perform numeric…
Perturbation Theory with a Variational Basis: the Generalized Gaussian Effective Potential
Paolo Cea, Luigi Tedesco
The perturbation theory with a variational basis is constructed and analyzed.The generalized Gaussian effective potential is introduced and evaluated up to the second order for sel…
Exploring the Unstable Modes Dynamics by the Lattice Schrodinger Functional
Paolo Cea, Leonardo Cosmai
We analyze the problem of the Nielsen-Olesen unstable modes in the lattice gauge theory by means of a recently introduced gauge-invariant effective action. We perform numer…
Finite Size Analysis of the U(1) Background Field Effective Action
Paolo Cea, Leonardo Cosmai, Antonio D. Polosa
We apply the finite size scaling analysis to the derivative of the density of the effective action for the lattice U(1) pure gauge theory in an external constant magnetic field. We…
Lattice Background Effective Action: a Proposal
Paolo Cea, Leonardo Cosmai
We propose a method based on the Schrödinger functional for computing on the lattice the gauge invariant effective action for external background fields. We check this method by st…
Vacuum Stability for Dirac Fermions in Three Dimensions
Paolo Cea
I investigate three dimensional abelian and non-abelian gauge theories interacting with Dirac fermions. Using a variational method I evaluate the vacuum energy density in the one-l…