Lensing and imaging by a stealth defect of spacetime

@article{Klinkhamer2018LensingAI,
  title={Lensing and imaging by a stealth defect of spacetime},
  author={F. R. Klinkhamer and Z. L. Wang},
  journal={Modern Physics Letters A},
  year={2018}
}
We obtain the geodesics for the simplest possible stealth defect which has a flat spacetime. We, then, discuss the lensing properties of such a defect, and the corresponding image formation. Similar lensing properties can be expected to hold for curved-spacetime stealth defects. 
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6 Citations

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References

SHOWING 1-10 OF 19 REFERENCES

A stealth defect of spacetime

We discuss a special type of Skyrmion spacetime-defect solution, which has a positive energy density of the matter fields but a vanishing asymptotic gravitational mass. With a mass term for the…

Mass generation by a Lorentz-invariant gas of spacetime defects

We present a simple model of defects embedded in flat spacetime, where the model is designed to maintain Lorentz invariance over large length scales. Even without remnant Lorentz violation, there are…

Gravitational lensing by wormholes

Gravitational lensing by traversable Lorentzian wormholes is a new possibility which is analyzed here in the strong field limit. Wormhole solutions are considered in the Einstein minimally coupled…

Comparison of spacetime defects which are homeomorphic but not diffeomorphic

Certain remnants of a quantum spacetime foam can be modeled by a distribution of defects embedded in a flat classical spacetime. The presence of such spacetime defects affects the propagation of…

Antigravity from a spacetime defect

We argue that there may exist spacetime defects embedded in Minkowski spacetime, which have negative active gravitational mass. One such spacetime defect then repels a test particle, corresponding to…

LENS-LIKE ACTION OF A STAR BY THE DEVIATION OF LIGHT IN THE GRAVITATIONAL FIELD.

Some time ago, R. W. Mandi paid me a visit and asked me to publish the results of a little calculation, which I had made at his request. This note complies with his wish.

Gravitational lensing by scalar-tensor wormholes and the energy conditions

We study gravitational lensing by a class of zero Ricci scalar wormholes which arise as solutions in a scalar-tensor theory of gravity. An attempt is made to find a possible link between lensing…

Skyrmion spacetime defect

A finite-energy static classical solution is obtained for standard Einstein gravity coupled to an $SO(3)\ifmmode\times\else\texttimes\fi{}SO(3)$ chiral model of scalars (a Skyrme model). This…

Exact gravitational lens equation in spherically symmetric and static spacetimes

Lensing in a spherically symmetric and static spacetime is considered, based on the lightlike geodesic equation without approximations. After fixing two radius values r_O and r_S, lensing for an…

Einstein-Rosen bridges and the characteristic properties of gravitational lensing by them

It is shown that Einstein-Rosen bridges (wormholes)—hypothetical objects that topologically connect separate locations in the Universe—can be static solutions of the Einstein equations. The…