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- Landau_pole abstract "In physics, the Landau pole or the Moscow zero is the momentum (or energy) scale at which the coupling constant (interaction strength) of a quantum field theory becomes infinite. Such a possibility was pointed out by the physicist Lev Landau and his colleagues. The fact that couplings depend on the momentum (or length) scale is the central idea behind the renormalization group.Landau poles appear in theories that are not asymptotically free, such as quantum electrodynamics (QED) or φ4 theory—a scalar field with a quartic interaction—such as may describe the Higgs boson. In these theories, the renormalized coupling constant grows with energy. A Landau pole appears when the coupling becomes infinite at a finite energy scale. In a theory purporting to be complete, this could be considered a mathematical inconsistency. A possible solution is that the renormalized charge could go to zero as the cut-off is removed, meaning that the charge is completely screened by quantum fluctuations (vacuum polarization). This is a case of quantum triviality, which means that quantum corrections completely suppress the interactions in the absence of a cut-off.Since the Landau pole is normally identified through perturbative one-loop or two-loop calculations, it is possible that the pole is merely a sign that the perturbative approximation breaks down at strong coupling. Lattice field theory provides a means to address questions in quantum field theory beyond the realm of perturbation theory, and thus has been used to attempt to resolve this question. Numerical computations performed in this framework seems to confirm Landau's conclusion that QED charge is completely screened for an infinite cutoff.".
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- Landau_pole wikiPageWikiLink Alexei_Alexeyevich_Abrikosov.
- Landau_pole wikiPageWikiLink Asymptotic_freedom.
- Landau_pole wikiPageWikiLink Category:Quantum_field_theory.
- Landau_pole wikiPageWikiLink Category:Renormalization_group.
- Landau_pole wikiPageWikiLink Coupling_constant.
- Landau_pole wikiPageWikiLink Electroweak_interaction.
- Landau_pole wikiPageWikiLink Fine-structure_constant.
- Landau_pole wikiPageWikiLink Francis_E._Low.
- Landau_pole wikiPageWikiLink Grand_Unified_Theory.
- Landau_pole wikiPageWikiLink Higgs_boson.
- Landau_pole wikiPageWikiLink Isaak_Markovich_Khalatnikov.
- Landau_pole wikiPageWikiLink Isaak_Pomeranchuk.
- Landau_pole wikiPageWikiLink Large_Hadron_Collider.
- Landau_pole wikiPageWikiLink Lattice_field_theory.
- Landau_pole wikiPageWikiLink Length_scale.
- Landau_pole wikiPageWikiLink Lev_Landau.
- Landau_pole wikiPageWikiLink Lev_Lipatov.
- Landau_pole wikiPageWikiLink Monte_Carlo_method.
- Landau_pole wikiPageWikiLink Murray_Gell-Mann.
- Landau_pole wikiPageWikiLink Particle_physics.
- Landau_pole wikiPageWikiLink Perturbation_theory_(quantum_mechanics).
- Landau_pole wikiPageWikiLink Physics.
- Landau_pole wikiPageWikiLink Planck_scale.
- Landau_pole wikiPageWikiLink Quantum_electrodynamics.
- Landau_pole wikiPageWikiLink Quantum_field_theory.
- Landau_pole wikiPageWikiLink Quantum_gravity.
- Landau_pole wikiPageWikiLink Quantum_triviality.
- Landau_pole wikiPageWikiLink Quartic_interaction.
- Landau_pole wikiPageWikiLink Reductio_ad_absurdum.
- Landau_pole wikiPageWikiLink Renormalization_group.
- Landau_pole wikiPageWikiLink Scalar_field.
- Landau_pole wikiPageWikiLink Standard_Model.
- Landau_pole wikiPageWikiLink Vacuum_polarization.
- Landau_pole wikiPageWikiLinkText "Landau pole".
- Landau_pole wikiPageWikiLinkText "pole".
- Landau_pole wikiPageWikiLinkText "zero interaction phenomenon".
- Landau_pole wikiPageUsesTemplate Template:=.
- Landau_pole wikiPageUsesTemplate Template:Main.
- Landau_pole wikiPageUsesTemplate Template:Math.
- Landau_pole wikiPageUsesTemplate Template:Mvar.
- Landau_pole subject Category:Quantum_field_theory.
- Landau_pole subject Category:Renormalization_group.
- Landau_pole hypernym Scale.
- Landau_pole type Aircraft.
- Landau_pole type Mechanic.
- Landau_pole type Physic.
- Landau_pole comment "In physics, the Landau pole or the Moscow zero is the momentum (or energy) scale at which the coupling constant (interaction strength) of a quantum field theory becomes infinite. Such a possibility was pointed out by the physicist Lev Landau and his colleagues.".
- Landau_pole label "Landau pole".
- Landau_pole sameAs Q4371287.
- Landau_pole sameAs Biegun_Landaua.
- Landau_pole sameAs m.033rd0.
- Landau_pole sameAs Полюс_Ландау.
- Landau_pole sameAs Landau_kutbu.
- Landau_pole sameAs Q4371287.
- Landau_pole wasDerivedFrom Landau_pole?oldid=695343592.
- Landau_pole isPrimaryTopicOf Landau_pole.