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		<title>Calimero0000: uma edição</title>
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		<updated>2013-05-03T11:42:23Z</updated>

		<summary type="html">&lt;p&gt;uma edição&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Página nova&lt;/b&gt;&lt;/p&gt;&lt;div&gt;Em [[física]], &amp;#039;&amp;#039;&amp;#039;retículo cromodinâmico quântico&amp;#039;&amp;#039;&amp;#039; (retículo QCD, do inglês &amp;#039;&amp;#039;quantum chromodynamics&amp;#039;&amp;#039;) é uma teoria de [[quark]]s e [[glúon]]s formulada sobre um [[retículo (grupo)|retículo]] espaço-tempo. Este é um [[modelo de retículo (física)|modelo de retículo]] da [[cromodinâmica quântica]], um caso especial de uma [[teoria do retículo gauge]] ou [[teoria de campo reticular]]. No momento, esta é a abordagem não perturbativa mais bem estabelecida par resolver a teoria da Cromodinâmica Quântica.&lt;br /&gt;
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Soluções analíticas ou perturbativas em [[Cromodinâmica quântica|QCD]] são difíceis ou impossíveis devido a natureza altamente não linear da [[força nuclear forte]]. A formulação da QCD em um espaço-tempo contínuo mais discreto introduz naturalmente um [[momento]] eliminado na ordem 1/a, que regulariza a teoria. Em conseqüência a estrutura QCD é matematicamente bem definida. Mais importante ainda, a estrutura QCD fornece a estrutura para a investigação de fenômenos não perturbativos como o [[confinamento]] e a formação de [[plasma de quarks-glúons]], que são intratáveis por meio das teorias de campo analíticas.&lt;br /&gt;
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{{em tradução|:en:Lattice QCD}}&lt;br /&gt;
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&amp;lt;!--&lt;br /&gt;
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Analytic or perturbative solutions in [[quantum chromodynamics|QCD]] are hard or impossible due to the highly nonlinear nature of the strong force. The formulation of QCD on a discrete rather than continuous space-time naturally introduces a momentum cut off at the order 1/a, which regularizes the theory. As a result lattice QCD is mathematically well-defined. Most importantly, lattice QCD provides the framework for investigation of non-perturbative phenomena such as [[colour confinement|confinement]] and [[quark-gluon plasma]] formation, which are intractable by means of analytic field theories.&lt;br /&gt;
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In lattice QCD spacetime is represented not as continuous but as a crystalline lattice, vertices connected by lines. Quarks may reside only on vertices and gluons can only travel along lines. While this is understood to be a fiction, the hope is that as the spacing between vertices is reduced to zero, or to the Planck length, the the theory will yield meaningful results.&lt;br /&gt;
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This technique is only applicable in the domain of low density and high temperature; at higher densities, the region alas of greatest interest, the fermion sign problem renders the results useless. Lattice QCD predicts that confined quarks will become released to quark-gluon plasma around energies of 170 MeV. Lattice QCD&amp;#039;s limitation to low density does not allow investigation of the color flavor locked states (CFL) at higher densities.&lt;br /&gt;
&lt;br /&gt;
Lattice QCD has already made contact with experiments at various fields with good results. A particular important tool of the theory showing the [[confinement]] of the underlying fields is the [[Wilson loop]] variable, described in a separate article.&lt;br /&gt;
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 --&amp;gt;&lt;br /&gt;
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{{Referências}}&lt;br /&gt;
* Creutz, Michael; &amp;quot;&amp;#039;&amp;#039;Quarks, Gluons and Lattices&amp;#039;&amp;#039;&amp;quot; (Cambridge, 1983)&lt;br /&gt;
* Degrand and De Tar; &amp;quot;&amp;#039;&amp;#039;Lattice Methods for Quantum Chromodynamics&amp;#039;&amp;#039;&amp;quot; (World Scientific, 2006)&lt;br /&gt;
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== {{Ver também}} ==&lt;br /&gt;
* [[Teoria do retículo gauge]]&lt;br /&gt;
* [[Plasma de quarks-glúons]]&lt;br /&gt;
* [[Matéria QCD]]&lt;br /&gt;
&lt;br /&gt;
== {{Ligações externas}} ==&lt;br /&gt;
* {{Link|en|2=http://arxiv.org/abs/hep-lat/9807028 |3=Gupta - Introduction to Lattice QCD}} &lt;br /&gt;
* {{Link|en|2=http://arxiv.org/abs/hep-lat/0509180 |3=Lombardo - Lattice QCD at Finite Temperature and Density}} &lt;br /&gt;
* {{Link|en|2=http://arxiv.org/abs/hep-lat/0405024 |3=Chandrasekharan, Wiese - An Introduction to Chiral Symmetry on the Lattice}} &lt;br /&gt;
&lt;br /&gt;
{{Esboço-física}}&lt;br /&gt;
&lt;br /&gt;
{{DEFAULTSORT:Reticulo Qcd}}&lt;br /&gt;
[[Categoria:Mecânica quântica]]&lt;/div&gt;</summary>
		<author><name>Calimero0000</name></author>
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