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Holographic Einstein rings of a black hole with a global monopole
The global monopole solutions which give rise to quite unusual physical
phenomena have captured considerable attention. In this paper, we study the
Einstein ring of the spherically symmetric AdS black hole solution with a
global monopole based on the AdS/CFT correspondence. With the help of the given
response function of the QFT on the boundary, we construct the holographic
images of the black hole in the bulk. The Einstein rings on the images can be
clearly observed. The holographic ring always appears with the concentric
stripe surrounded when the observer located at the north pole, and an extremely
bright ring when the observer is at the position of the photon sphere of the
black hole. With the change of the observation position, this ring will change
into a luminosity-deformed ring, or light points. Furthermore, we show that the
monopole parameter has an effect on the brightness and the position of Einstein
ring. All these results imply that the holographic images can be used as an
effective tool to distinguish different types of black holes for fixed wave
source and optical system.Comment: revised versio
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