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- Seitenbereich
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0287 - 0316
- Schlagwort(e)
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<KWD>Hamiltonian field theory
Spontaneous symmetry breaking
Variational approach
- Zusammenfsg.
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We use a Gaussian wave functional for the ground state to reorder the Hamiltonian into a free part with a variationally determined mass and the rest. Once spontaneous symmetry breaking is taken into account, the residual Hamiltonian can, in principle, be treated perturbatively. In this scheme we analyze the <I>O</I>(1) and <I>O</I>(2) scalar models. For the <I>O</I>(2)-theory we first explicitly calculate the massless Goldstone excitation and then show that the one-loop corrections of the effective Hamiltonian do not generate a mass.
- Artikel-Typen
- Forschungsartikel