All Questions
10
questions
6
votes
2
answers
496
views
Hawking Radiation without a horizon?
I’m reading this article for a straightforward derivation of the Hawking effect https://www.researchgate.net/publication/...
user310742
1
vote
2
answers
186
views
Is there a back-reaction in Hawking radiation?
Here, the following explanation for Hawking radiation in canonical quantum gravity is given:
The local energy density is well-defined as the 00 component of the stress-energy tensor. It is frame ...
4
votes
1
answer
526
views
Planck's constant, Boltzmann constant and Hawking Temperature
The Hawking temperature of a Schwarzschild black hole is given in SI units as
$$T_{H}=\frac{\hbar c^3}{8 \pi G k_{B} M},$$
where $k_{B}$ is the Boltzmann constant. I would like to know how $\hbar$ and ...
- 329
3
votes
0
answers
128
views
A good introductory reference for Hawking radiation?
I am looking for a good reference to study the Hawking effect in detail. Hawking's original paper is a nightmare. I first tried this introductory paper but it skips a lot of details, Ford's QFT notes ...
1
vote
1
answer
64
views
How can both horizon and outgoing modes be kept together in this state if evaporation eliminates the horizon?
In the original computation of Hawking radiation one starts with a gravitational collapse spacetime (like the Vaidya geometry with $M(v)=M_0\theta(v-v_0)$). Then one introduces three complete sets of ...
- 36.4k
5
votes
1
answer
342
views
Why is Hawking radiation exclusive to black holes *only*?
Why isn't Hawking radiation emitted by every massive body? (because every massive body causes deformation of space-time, and this causes the vacuum state to be observer dependent, if I'm not wrong)
...
- 7,319
2
votes
2
answers
189
views
Can a fundamental particle black hole with conserved charge emit Hawking radiation?
Let's says there is a fundamental particle:
That is so massive that it is a black hole by itself (Compton wavelength < Schwarzschild radius)
That carries a conserved quantum number (e.g. charge ...
5
votes
3
answers
1k
views
Hawking Radiation: how does a particle ever cross the event horizon?
The heuristic argument for Hawking Radiation is, that a virtual pair-production happens just at the event horizon. One particle goes into the black hole, while the other can be observed as radiation.
...
- 644
7
votes
1
answer
357
views
Hawking radiation: direct matter -> energy conversion?
When a black hole evaporates, does it turn all the matter that has fallen in directly to energy, or will it somehow throw back out the same kind of matter (normal or anti) that went in?
- 345
18
votes
3
answers
2k
views
Why is there a flux of radiation in the Hawking effect but not in the Unruh effect? (and other questions)
This question is slightly related to this one Do all massive bodies emit Hawking radiation?, which I think was poorly posed and so didn't get very useful answers. There are several questions in this ...
- 8,800