4 votes

Definitions of Thermodynamics and Holography

To go bottom top: our universe is not AdS. AdS/CFT is wonderful because it was the first description of holography that explicitly could be used to do bulk reconstruction and subregion duality. People ...
VaibhavK's user avatar
  • 391
4 votes

Will the photon ever reach the object falling into the black hole?

Ivella asked: "How do you calculate if the object will ever receive the light signal before reaching the center of the BH?" The photon doesn't always reach the falling object. In the ...
Yukterez's user avatar
  • 10.5k
3 votes

Definitions of Thermodynamics and Holography

The notion of "equilibrium" in black hole thermodynamics would be between the radiation background and the black hole, not between two merging black holes. The ADM mass of the black hole is ...
Zo the Relativist's user avatar
2 votes

Do black holes emit no light or does light fall back in black holes?

Let us conduct a following experiment: We send a photon to a mirror hovering near the event horizon of a black hole, and we observe what happens when we move the mirror closer to the event horizon. We ...
stuffu's user avatar
  • 1,911
1 vote

Do black holes emit no light or does light fall back in black holes?

Your intuition is that of Newtonian mechanics, I can say this because you said "Black holes have such a strong gravity that escape velocity from it is more than speed of light which basically ...
Jeanbaptiste Roux's user avatar
1 vote
Accepted

Is the Ryu-Takayanagi (RT) formula calculating coarse-grained or fine-grained entropy?

I cannot tell you how stoked I am to see a fellow AdS/CFT-er. For the sake of the answer and physicality, I will not work with Ryu-Takayanagi but instead the covariant description, given by the Hubeny-...
VaibhavK's user avatar
  • 391
1 vote

Can a body escape a black hole by being thrusted?

The quick answer is no because time and spatial coordinates twist roles. As well as you can only move in one direction in time (forwards), inside a black hole you can't go backward in the radial ...
T. ssP's user avatar
  • 358

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