QCD vacuum | Wikipedia audio article
Channel: wikipedia tts
Date: 24/12/2018

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/QCD_vacuum


00:00:25 1 Symmetries and symmetry breaking
00:00:36 1.1 Symmetries of the QCD Lagrangian
00:02:10 1.2 Spontaneous symmetry breaking
00:03:30 1.3 Symmetries of the QCD vacuum
00:04:43 2 Experimental evidence
00:05:17 2.1 Motivating results
00:05:26 2.1.1 Gradient coupling
00:07:27 2.1.2 Goldberger–Treiman relation
00:08:50 2.1.2.1 Partially conserved axial current
00:11:47 2.1.3 Soft pion emission
00:12:20 2.2 Pseudo-Goldstone bosons
00:13:12 2.3 Eta prime meson
00:14:14 2.4 Current algebra and QCD sum rules
00:16:47 3 Models of the QCD vacuum
00:17:38 3.1 The Savvidy vacuum, instabilities and structure
00:18:45 3.2 The dual superconducting model
00:19:51 3.3 String models
00:21:27 3.4 Bag models
00:23:59 3.5 Instanton ensemble
00:26:07 3.6 Center vortex picture
00:26:53 4 See also



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SUMMARY
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The Quantum Chromodynamic Vacuum or QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non-perturbative vacuum state, characterized by non-vanishing condensates such as the gluon condensate and the quark condensate in the complete theory which includes quarks. The presence of these condensates characterizes the confined phase of quark matter.