Lensing and imaging by a stealth defect of spacetime

  title={Lensing and imaging by a stealth defect of spacetime},
  author={F. R. Klinkhamer and Z. L. Wang},
  journal={Modern Physics Letters A},
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. 

Non-metric construction of spacetime defects

  • J. Queiruga
  • Physics, Mathematics
    Classical and Quantum Gravity
  • 2020
We describe a spacetime endowed with a non-metricity tensor which effectively serves as a model of a spacetime foam. We explore the consequences of the non-metricity in several f(R) theories.

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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.

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