Vacuum polarization in the gravitational field of a cosmic string

1987 ◽  
Vol 35 (12) ◽  
pp. 3779-3782 ◽  
Author(s):  
V. P. Frolov ◽  
E. M. Serebriany
Keyword(s):  
Gravitational Field ◽  
Cosmic String ◽  
Vacuum Polarization

scholarly journals VACUUM POLARIZATION NEAR BRANE WORLD COSMIC STRING

2002 ◽  
Vol 17 (18) ◽  
pp. 1207-1214 ◽  
Author(s):  
YU. V. GRATS ◽  
A. A. ROSSIKHIN
Keyword(s):  
Gravitational Field ◽  
Cosmic String ◽  
Vacuum Polarization ◽  
Cosmic Strings ◽  
Brane World ◽  
Spatial Dimensions

Gravitational field of cosmic strings in theories with extra spatial dimensions differs significantly from that in the 4D Einstein's theory. This means that all gravity induced properties of cosmic strings need to be revised. Here we consider the effect of vacuum polarization outside a straight infinitely thin cosmic string embedded in RS2 brane world.

The spin-zero Duffin-Kemmer-Petiau equation in a cosmic-string space-time with the Cornell interaction

2016 ◽  
Vol 31 (36) ◽  
pp. 1650191 ◽  
Author(s):  
M. de Montigny ◽  
M. Hosseinpour ◽  
H. Hassanabadi
Keyword(s):  
Gravitational Field ◽  
Coordinate System ◽  
Cosmic String ◽  
Topological Defects ◽  
Space Time ◽  
Dkp Equation

In this paper, we study the covariant Duffin-Kemmer-Petiau (DKP) equation in the cosmic-string space-time and consider the interaction of a DKP field with the gravitational field produced by topological defects in order to examine the influence of topology on this system. We solve the spin-zero DKP oscillator in the presence of the Cornell interaction with a rotating coordinate system in an exact analytical manner for nodeless and one-node states by proposing a proper ansatz solution.

Higher corrections in the theory of vacuum polarization by an isotropic gravitational field

1989 ◽  
Vol 32 (10) ◽  
pp. 811-817 ◽  
Author(s):  
G. M. Vereshkov ◽  
A. V. Korotun ◽  
A. N. Poltavtsev
Keyword(s):  
Gravitational Field ◽  
Vacuum Polarization

scholarly journals Angle deficit and nonlocal gravitoelectromagnetism around a slowly spinning cosmic string

2020 ◽  
Vol 29 (14) ◽  
pp. 2043027
Author(s):  
Jens Boos
Keyword(s):  
Gravitational Field ◽  
Symmetry Breaking ◽  
Early Universe ◽  
Physical Interpretation ◽  
Cosmic String ◽  
Cosmic Strings ◽  
Radial Distance ◽  
Gravitomagnetic Field ◽  
Simply Connected

Cosmic strings, as remnants of the symmetry breaking phase in the Early universe, may be susceptible to nonlocal physics. Here, we show that the presence of a Poincaré-invariant nonlocality—parametrized by a factor [Formula: see text]—regularizes the gravitational field and thereby changes the properties of spacetime: it is now simply connected and the angle deficit around the cosmic string becomes a function of the radial distance. Similar changes occur for the nonlocal gravitomagnetic field of a rotating cosmic string, and we translate these mathematical facts into the language of nonlocal gravitoelectromagnetism and thereby provide a physical interpretation. We hope that these insights might provide a helpful perspective in the search for traces of nonlocal physics in our universe.

scholarly journals Nonlocal metric realizations of MOND

2015 ◽  
Vol 93 (2) ◽  
pp. 242-249 ◽  
Author(s):  
R.P. Woodard
Keyword(s):  
Gravitational Field ◽  
Vacuum Polarization ◽  
Residual Effect ◽  
Weak Lensing ◽  
Field Equations ◽  
Full Field ◽  
Future Studies ◽  
Gravitational Field Equations ◽  
Primordial Inflation ◽  
Fisher Relation

I discuss relativistic extensions of MOND in which the metric couples normally to matter. I argue that MOND might be a residual effect from the vacuum polarization of infrared gravitons produced during primordial inflation. If so, MOND corrections to the gravitational field equations would be nonlocal. Nonlocality also results when one constructs metric field equations that reproduce the Tully–Fisher relation, along with sufficient weak lensing. I give the full field equations for the simplest class of models, and I specialize these equations to the geometries relevant for cosmology. I conclude by sketching the direction of future studies.

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