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7 papers
Vacuum Hydrodynamics
P. M. Stevenson
The Higgs vacuum -- with its constant background field -- is not `empty' but is a kind of medium. Any ordinary medium, viewed at sufficiently long length scales, has a hydrodynamic…
lambda Phi^4 Theory From a Particle-Gas Viewpoint
M. Consoli, P. M. Stevenson
We discuss the physics of the 3+1 dimensional lambda Phi^4 quantum field theory in terms of the statistical mechanics of a gas of particles (`atoms') that interact via a -1/r^3-plu…
The Banks-Zaks Expansion and "Freezing" in Perturbative QCD
S. A. Caveny, P. M. Stevenson
The recent calculation of the four-loop beta function in QCD provides further evidence that the Banks-Zaks expansion in 16half-n_f is sufficiently well behaved to be useful even fo…
The lambda Phi^4 Miracle: lattice data and the zero-point potential
P. M. Stevenson
Recent lattice data for the effective potential of lambda Phi^4 theory fits the massless one-loop formula with amazing precision. Any corrections are at least 100 times smaller tha…
"TRIVIALITY" MADE EASY: the real (lambda Phi^4)_4 story
M. Consoli, P. M. Stevenson
The real meaning of `triviality' of (lambda Phi^4)_4 theory is outlined. Assuming `triviality' leads to an effective potential that is just the classical potential plus the zero-po…
Triviality" and the Perturbative Expansion in Theory
M. Consoli, P. M. Stevenson
The "triviality" of quantum field theory means that the renormalized coupling vanishes for infinite cutoff. That result inherently conflicts with the usual perturb…