Recent content by Chiara

Indeed. But is there a really precise measurement device that does not count photons?

A text I read some weeks ago claimed that all measurements count photons. Indeed, even a thermometer requires light to be read off, and also a balance. Is there a type of measurement or a measurement device that does not count photons?

"Black" means: "It does not shine". This is the prediction of general relativity. A non-zero BH temperature means: it does shine, it is not black. That was the discovery. By the way: "Jacobson gave a purely mathematical proof: the entropy of black holes, their temperature, and their...

Jacobson gave a purely mathematical proof: the entropy of black holes, their temperature, and their mass/energy, taken together, imply the field equations. Various experiments, e.g. about Unruh temperature, imply that black holes have a temperature. General relativity predicts that black hole...

He showed in his paper that the entropy of black holes, their temperature, and their mass/energy, taken together, imply the field equations. Here is his 1995 paper: https://arxiv.org/abs/gr-qc/9504004

The abstract starts with "It was conjectured 30 years ago that gravity could arise from the entropic rearrangement of information." It seems to me that Jacobson proved that gravity is entropic. He did not conjecture anything. Am I wrong?

I am new here. Above all, I am passionately curious about fundamental physics.