Questions tagged [quantum-mechanics]
The quantum-mechanics tag has no usage guidance.
26
questions
2
votes
0
answers
77
views
Entanglement in- and outside the observable universe
Consider the limit of the observable universe.
Assume we received and analysed a photon coming from a distant region close to the edge of the observable universe.
If we believed - based on energy ...
- 285
4
votes
1
answer
990
views
Which wavelength is most likely to be emitted over the lifetime of a black hole by hawking radiation and which is most likely at any given time?
What equations tells us the most likely wavelength emitted for a given black hole mass at any instant in time and over the whole life of the black hole?
user50918
21
votes
5
answers
4k
views
Why does electron degeneracy pressure not stop massive star collapse?
I was thinking a little bit, and never asked myself the following. If white dwarfs do not collapse, because electron degeneracy pressure stops the star from collapsing by its own gravity, and this is ...
- 415
3
votes
0
answers
56
views
How would white light cavities (WLC) work for gravitational wave detection?
A study done by Michael A. Page, Maxim Goryachev, Haixing Miao, and peers states that WLCs can be used to improve the sensitivity of LIGO. LIGO currently uses photons (for very constant speed at which ...
0
votes
2
answers
81
views
When calculating the mass of stars, is it considered that additional mass could be added because of pair-production?
I would like to know that, since stars emit a lot of photons where some of them could be producing electrons-positrons pairs, if its mass affects the calculations, and if because of this is different ...
- 131
1
vote
1
answer
102
views
Was quantum metrology important for gravitational-wave astronomy?
This article from 2010 titled Quantum metrology for gravitational wave astronomy, 6 years before the announcement of the first direct detection of gravitational waves from a binary black hole merger, ...
- 4,533
-2
votes
2
answers
222
views
Can Quantum tunneling be possible within Blackhole ? And if so, could that be the source of Dark Energy?
Quantum tunneling starts happening when there are empty energy states available for the electrons to occupy and the energy barrier is of the order of the wavefunction of the electrons.
Could there be ...
0
votes
1
answer
93
views
Can somebody explain heisenberg uncertainty principle to 14 year old me? [closed]
I'm a young student that's very curious about physics and especially some physics theories. I've watched a TED video about the Heisenberg uncertainty principle, but I couldn't fully understand it and ...
0
votes
1
answer
433
views
Does Hawking Radiation really exist and Why "negative energy" in virtual particles? [duplicate]
I'm doing some research on black holes for a science video contest - more specifically, on Hawking Radiation. As far as I know, there are these constant quantum fluctuations of "virtual" ...
- 655
0
votes
0
answers
225
views
How spaghettification is possible at the Event Horizon of a supermassive black hole?
if gravity is too strong then it will break a object apart as gravity is strong enough to break the chemical composition of object why we consider "Spaghettification" relevant in this case ?
- 11
-1
votes
1
answer
218
views
What is dark energy made of? [duplicate]
What are the fundamental constituents of Dark Energy?
Can we quantize dark energy in the first place, if it is a kind of Energy?
2
votes
0
answers
101
views
How String Theory calculates the Entropy of the Black Hole in a Background dependent way?
How does string theory get an agreement to the Hawking-Bekenstein equations to calculate the quantum entropy of a black hole in a background dependent way?
Is there any sort of area parameter in ...
0
votes
0
answers
60
views
How would you define "space" in GR (General Relativity) and in QFT (Quantum Field Theory)?
Is there a univocal definition of space that can be accepted in GR and in QFT?
In GR space is actually "Spacetime", a 4-dimensional entity that includes time. In this case it's impossible to ...
-1
votes
1
answer
154
views
What is the final destiny of a photon?
What happens with a photon when it moves ouit of a galaxy into the 'infinity void', where there's nothing but 'darkness'? Does the photon decay in the end when there are no interactions?
- 159
2
votes
2
answers
305
views
Is blue light not traveling faster then red light in space?
I just can't understand why light and other massless particles are not traveling at different speeds?
Gravity effects anything with a mass but light has no mass but a black hole, and weak lensing ...
- 1