Tunneling in two-dimensional QCD
| Autor: | Poul Olesen |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
High Energy Physics - Theory
Quantum chromodynamics Physics Nuclear and High Energy Physics Phase transition Continuum (topology) High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) FOS: Physical sciences Spectral density Critical area String (physics) High Energy Physics - Lattice High Energy Physics - Theory (hep-th) Quantum mechanics Domain (ring theory) Quantum tunnelling |
| Zdroj: | Nuclear Physics B. 752:197-205 |
| ISSN: | 0550-3213 |
| DOI: | 10.1016/j.nuclphysb.2006.06.027 |
| Popis: | The spectral density for two dimensional continuum QCD has a non-analytic behavior for a critical area. Apparently this is not reflected in the Wilson loops. However, we show that the existence of a critical area is encoded in the winding Wilson loops: Although there is no non-analyticity or phase transition in these Wilson loops, the dynamics of these loops consists of two smoothly connected domains separated by the critical area, one domain with a confining behavior for large winding Wilson loops, and one (below the critical size) where the string tension disappears. We show that this can be interpreted in terms of a simple tunneling process between an ordered and a disordered state. In view of recent results by Narayanan and Neuberger this tunneling may also be relevant for four dimensional QCD. 10 pages. Clarifying remarks have been added |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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