arXiv subjects

Ferdinando Gliozzi

Publications and source records attributed to Ferdinando Gliozzi.

39 records · Page 3Linked to original sources

arXiv2001

String breaking mechanisms induced by magnetic and electric condensates

The normal confining phase of gauge theories is characterised by the condensation of magnetic monopoles and center vortices. Sometimes in coupled gauge system one finds another phase with simultaneous condensation of electric and magnetic charges. In both phases the confining string breaks down at a given scale because of pair creation, however the mechanism is different. In the former case the string breaking is a mixing phenomenon which is invisible in the Wilson loop. On the contrary, in presence of both electric and magnetic condensates the string breaking can be observed even in the Wilson loops. Numerical experiments on a 3D $Z_2$ gauge-Higgs system neatly show this new phenomenon.

hep-lat↗

arXiv2000

Some universal properties of the string breaking

In gauge systems coupled to matter, the static potential flattens out at a scale where the confining string breaks by formation of a dynamical pair of particles. Surprisingly, such a breaking is invisible in Wilson loops even when the inter-charge separation is much larger than the flattening scale. Observing string breaking also requires using different operators. A known string mechanism provides us with a simple explanation, leading to the area law for large Wilson loops, as observed in most gauge models coupled to whatever kind of matter. It is also pointed out that in a simple 3D Z_2 gauge-Higgs model, once reformulated in terms of Fortuin Kasteleyn clusters, this peculiar behaviour of the Wilson operator can be ascribed to non-trivial linking of a percolating cluster to the Wilson loop. Some numerical tests on this model are also presented.

hep-lat↗

arXiv1996

Nature of the Vacuum inside the Color Flux Tube

The interior of the color flux tube joining a quark pair can be probed by evaluating the correlator of pair of Polyakov loops in a vacuum modified by another Polyakov pair, in order to check the dual superconductivity conjecture which predicts a deconfined, hot core. We also point out that at the critical point of any 3D gauge theories with a continuous deconfining transition the Svetitsky-Yaffe conjecture provides us with an analytic expression of the Polyakov correlator as a function of the position of the probe inside the flux tube. Both these predictions are compared with numerical results in 3D Z2 gauge model finding complete agreement.

hep-lat↗