scholarly journals Global monopoles can change Universe's topology

2016 ◽  
Vol 756 ◽  
pp. 268-272 ◽  
Author(s):  
Anja Marunović ◽  
Tomislav Prokopec
Keyword(s):  
Global Monopoles

scholarly journals Magnetic Global Monopoles from Torsion

2018 ◽  
Vol 182 ◽  
pp. 02110
Author(s):  
Sarben Sarkar
Keyword(s):  
Classical Solution ◽  
Magnetic Charge ◽  
New Physics ◽  
Axion Field ◽  
Global Monopoles

In the search of avatars of new physics, we present a new classical solution for electromagnetic monopoles induced by global gravitational monopoles in the presence of a four-dimensional Kalb-Ramond axion field. The torsion induces the magnetic charge of the monopole.

NONMINIMAL GLOBAL MONOPOLES AND ASTROPHYSICAL IMPLICATIONS

2002 ◽  
pp. 1652-1653
Author(s):  
ULISES NUCAMENDI ◽  
MARCELO SALGADO ◽  
DANIEL SUDARSKY
Keyword(s):  
Global Monopoles

scholarly journals Cosmological evolution of semilocal string networks

2019 ◽  
Vol 377 (2161) ◽  
pp. 20190004
Author(s):  
A. Achúcarro ◽  
A. Avgoustidis ◽  
A. López-Eiguren ◽  
C. J. A. P. Martins ◽  
J. Urrestilla
Keyword(s):  
Time Evolution ◽  
Topological Defect ◽  
Cosmic Strings ◽  
Thermodynamic Description ◽  
New Physics ◽  
Cosmological Evolution ◽  
Length Scale ◽  
Closed Loops ◽  
Global Monopoles ◽  
String Networks

Semilocal strings—a particular limit of electroweak strings—are an interesting example of a stable non-topological defect whose properties resemble those of their topological cousins, the Abrikosov–Nielsen–Olesen vortices. There is, however, one important difference: a network of semilocal strings will contain segments. These are ‘dumbbells’ whose ends behave almost like global monopoles that are strongly attracted to one another. While closed loops of string will eventually shrink and disappear, the segments can either shrink or grow, and a cosmological network of semilocal strings will reach a scaling regime. We discuss attempts to find a ‘thermodynamic’ description of the cosmological evolution and scaling of a network of semilocal strings, by analogy with well-known descriptions for cosmic strings and for monopoles. We propose a model for the time evolution of an overall length scale and typical velocity for the network as well as for its segments, and some supporting (preliminary) numerical evidence. This article is part of a discussion meeting issue ‘Topological avatars of new physics’.

Renormalized quantum stress–energy tensor for massive spinor fields around global monopoles

2020 ◽  
Vol 35 (11) ◽  
pp. 2050077
Author(s):  
Owen Pavel Fernández Piedra
Keyword(s):  
Spinor Field ◽  
Energy Conditions ◽  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Spinor Fields ◽  
Characteristic Radius ◽  
Stress Energy ◽  
Massive Spinor ◽  
Global Monopoles ◽  
Tensor Formula

The renormalized quantum stress–energy tensor [Formula: see text] for a massive spinor field around global monopoles is constructed within the framework of Schwinger–DeWitt approximation, valid whenever the Compton length of the quantum field is much less than the characteristic radius of the curvature of the background geometry. The results obtained show that the quantum massive spinor field in the global monopole spacetime violates all the pointwise energy conditions.

scholarly journals Global monopoles in Brans-Dicke theory of gravity

1997 ◽  
Vol 56 (10) ◽  
pp. 6688-6691 ◽  
Author(s):  
A. Barros ◽  
C. Romero
Keyword(s):  
Theory Of Gravity ◽  
Global Monopoles

Motion of test particles around global monopoles in Brans-Dicke theory

Pramana ◽  
1998 ◽  
Vol 51 (6) ◽  
pp. 689-692 ◽  
Author(s):  
Subenoy Chakraborty ◽  
Md. Farook Rahaman
Keyword(s):  
Test Particles ◽  
Global Monopoles

scholarly journals GLOBAL MONOPOLES AND SCALAR FIELDS AS THE ELECTROGRAVITY DUAL OF SCHWARZSCHILD SPACE–TIME

2001 ◽  
Vol 16 (18) ◽  
pp. 1193-1200 ◽  
Author(s):  
NARESH DADHICH ◽  
NARAYAN BANERJEE
Keyword(s):  
Scalar Field ◽  
Equation Of State ◽  
Scalar Fields ◽  
Flat Space ◽  
Space Time ◽  
Global Monopole ◽  
Schwarzschild Solution ◽  
State Formula ◽  
Global Monopoles ◽  
First Time

We prove that both global monopole and minimally coupled static zero mass scalar field are electrogravity dual of the Schwarzschild solution or flat space and they share the same equation of state, [Formula: see text]. This property was however known for the global monopole space–time while it is for the first time being established for the scalar field. In particular, it turns out that the Xanthopoulos–Zannias scalar field solution is dual to flat space.

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