All Questions
124
questions
2
votes
0
answers
28
views
Implications of quantized space (a la LQG) on defining "realistic" number systems [duplicate]
Disclaimer: not a professional physicist or mathematician, so (deserved) tomato-throwing is welcome.
I've been pondering the "naturalness" of real numbers for some time now, in the sense of ...
- 121
0
votes
2
answers
61
views
How small can we measure space? [closed]
I got this question after looking into transcendental numbers and I noticed how there are some distinctions that should be made from numbers and reality especially in measurement of length for example ...
- 101
0
votes
0
answers
29
views
Does the Existence of Planck Units Suggest Discontinuity in Time and Space? [duplicate]
I’ve posed the following inquiry on Philosophy Stack Exchange:
Can the idea of continuity make sense in the real world?
A summary of it is presented here:
Continuity in mathematics means no jumps or ...
user397166
0
votes
0
answers
66
views
How can Planck-length elements exists in spacetime? [duplicate]
My question is simple, how can the theory of finite-sized elements (Planck-sized elements) in spacetime be correct, when you find the number $\pi$ in the Schwartzchild representation of the black hole,...
- 143
0
votes
1
answer
61
views
Approximating curved spacetime with a grid of cartesian metric tensors?
Let's assume a universe with only some ($n$) single point masses $m_i$ in it. The point masses have initial positions in space-time, $x_{i0}$.
The spacetime between them is curved due to general ...
- 63
1
vote
1
answer
102
views
If spacetime is discrete, would we observe continuous models to show non-rounding and non-truncation errors?
Typically, the ground truth is taken to be the continuous model. Numerical simulations are taken to be the approximation. These simulations deviate from the continuous model due to both a constant ...
- 870
1
vote
1
answer
90
views
Are there any physical phenomena (or any phenomena at all) that are independent of time?
I am writing a discrete event simulation engine. I am trying to figure out if there is anything that I cannot model. (As my system uses a time step as basic unit of change).
I can think of some ...
- 111
6
votes
3
answers
473
views
Is there a quantum gravity theory where ''space is discrete''?
I have been reading up on some approaches to quantum gravity apart from string theory. The popular conception of loop quantum gravity is that it says that space is actually physically discrete at ...
- 1,410
2
votes
2
answers
178
views
Space-time continuum expansion
I still don't understand how the expansion of the universe works.
If the universe is made up of an infinite number of points that make up space-time, then how can space expand or stretch. Common sense ...
- 343
-5
votes
2
answers
399
views
Is time continuous or discontinuous? [duplicate]
As I notice I sometimes feel as if time is discontinuous it’s like a comic book where each act is planned out and the main character just comes there. Please give an explanation and correct me if I am ...
- 21
0
votes
1
answer
90
views
Is there any good source talking about the quantization of time?
I am doing a little search about the quantization of time, but I didn't find anything explaining it in a conceptual or in a philosophical way? Is there anyone who can help?
0
votes
1
answer
100
views
Is space build of smaller space-particles?
In atomic physics one of the most decisive proves that the objects are build of atoms is that they can be deformed and twisted. So is it not logical to believe that space itself is also build of ...
- 651
3
votes
2
answers
245
views
Is using traditional continuous calculus appropriate to study discrete Nature events such as quantum physics? [duplicate]
I was wondering why traditional calculus is used for studying quantum physics considering that there seems to be no continuum at quantum scale but discrete. For example, differential equations ...
- 399
4
votes
1
answer
114
views
Is there any experiment to check discreteness of space?
This article from 2015 seems to suggest that there will be experiments to check discreteness of space:
If space-time is discrete, there should be imperfections. And even if
rare, these imperfections ...
- 395
1
vote
2
answers
212
views
If gravity is spacetime curvature, and spacetime doesn't show any discreteness, then gravity doesn't show any discreteness and can't be quantized?
I am not asking about why or how gravity should be quantized, or what the problem with renormalization is, or what the discrepancy is between QM and GR is. Those are beautifully described in other ...
- 29k