Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-04-08
Phys.Rev. D60 (1999) 096001
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 5 figures, REVTeX
Scientific paper
10.1103/PhysRevD.60.096001
The time evolution of soft modes in a quantum gauge field theory is to first approximation classical, but the equations of motion are non-local. We show how they can be written in a local and Hamiltonian way in an Abelian theory, and that this formulation is particularly suitable for numerical simulations. This makes it possible to simulate numerically non-equilibrium processes such as the phase transition in the Abelian Higgs model and and to study, for instance, bubble nucleation and defect formation. Such simulations would also help to understand phase transitions in more complicated gauge theories. Moreover, we show that the existing analytical results for the time-evolution in a pure-gauge theory correspond to a special class of initial conditions and that different initial conditions can lead to qualitatively different behavior. We compare the results of the simulations to analytical calculations and find an excellent agreement.
Hindmarsh Mark
Rajantie Arttu
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