Fully explorable horned particles hiding charge

Abstract

The charge-hiding effect by a horned particle, which was studied for the case where gravity/gauge-field system is self-consistently interacting with a charged lightlike brane (LLB) as a matter source, is now studied for the case of a time like brane. From the demand that no surfaces of infinite coordinate time redshift (horizons) appear in the problem we are lead now to a completly explorable horned particle space for traveller that goes through the horned particle (as was the case for the LLB) but now also in addition to this, the horned region is fully visible to a static external observer. This requires negative surface energy density for the shell sitting at the throat. We study a gauge field subsystem which is of a special non-linear form containing a square-root of the Maxwell term and which previously has been shown to produce a QCD-like confining gauge field dynamics in flat space-time. The condition of finite energy of the system or asymptotic flatness on one side of the horned particle implies that the charged object sitting at the throat expels all the flux it produces into the other side of the horned particle, which turns out to be of a "tube-like" nature. An outside observer in the asymptotically flat universe detects, therefore, apparently neutral object. The hiding of the electric flux behind the tube-like region of a horned particle is the only possible way that a truly charged particle can still be of finite energy, in a theory that in flat space describes confinement. This points to the physical relevance of such solutions, even though there is the need of *

Nonsingular electrovacuum solutions with dynamically generated cosmological constant

“…, resulting from the corrections to the Maxwell Lagrangian in (1). The appareance of a cosmological constant term r 2 /6r 2 g in ( 48) is a similar effect to that found in [17]. In (48) we have kept the minimum number of terms containing both ultraviolet corrections due to the gravitational Lagrangian, which manifest the existence of a wormhole structure, and infrared corrections coming from the matter sector, which are responsible for the asymptotically de Sitter behavior.…”

“…In this work we present wormhole-type solutions with a dynamically generated cosmological constant in the quadratic Palatini extension of GR studied in [7,8,9]. The matter sector of our theory, responsible for the dynamical generation of a cosmological constant [17] (see also [18]), will be described by a nonlinear theory of electrodynamics given by the Lagrangian density…”

Screening of the Reissner–Nordström charge by a thin-shell of dust matter

“…Naturally this takes us away from classical physics into the realm of gravity coupled QCD. Let us add that hiding of charge by geometrical structures has been considered before for example in [28]. Therein with cited references, it has been shown that non-linear contributions (see for instance [29]) in an effective theory beyond standard Einstein-Maxwell plays crucial roles.…”

Bag formation from gauge condensate

“…In Ref. [23] we have considered a theory describing confinement, in flat spacetime, through a non-linear Maxwell term in the form of…”