London model of dual color superconductor

0568481 - ÚJF 2023 RIV FR eng C - Conference Paper (international conference)
Hošek, Jiří
London model of dual color superconductor.
EPJ Web of Conferences. Vol. 274. Les Ulis: EDP Science, 2022, č. článku 02001. E-ISSN 2100-014X.
[Quark Confinement and the Hadron Spectrum Conference (ConfXV) /15./. Stavanger (NO), 01.08.2022-06.08.2022]
Institutional support: RVO:61389005
Keywords : chromoelectric field * QCD
OECD category: Particles and field physics
https://doi.org/10.1051/epjconf/202227402001

The Meissner effect for the chromoelectric field Ea is a property of the non-perturbative QCD vacuum medium assumed to explain the observed confinement of color. The color dielectric function ϵ of such a medium should vanish. By Lorentz invariance ϵμ = 1 i.e., its color magnetic permeability μ should diverge. The assumption based on analogy is well motivated: Ordinary superconductor is the physical medium with μ = 0, confining the opposite magnetic charges (would they exist). For the first successful phenomenological description of both the Meissner effect and superconductivity within Maxwell equations Fritz London guessed two equations for the superconductivity current. We adapt his arguments to QCD and come with two analogous manifestly non-Abelian London-like equations. One equation describes the dual Meissner effect. The analogy is, however, not perfect: We can only speculate that there is some sort of chromo-magnetic superfluidity in QCD phenomena to which the second equation might be ascribed. Moreover, from more advanced Ginzburg-Landau (GL) theory of superconductivity it follows that the Meissner effect is a consequence of spontaneous breaking of the underlying global U(1) symmetry. This is certainly not the case of the dual Meissner effect. Fortunately, the derived London-like equations suggest a strongly color-paramagnetic behavior. We interpret it as a guide to the phenomenological Ginzburg-Landau-like manifestly gauge-invariant low-momentum QCD with the confining vacuum which behaves as a perfect color paramagnet (μ = +∞).
Permanent Link: https://hdl.handle.net/11104/0339785