1
vote
3answers
102 views
Is everything pre-decided? [closed]
"There is nowhere in the universe where the laws of physics are violated." Considering this general to be true,can i conclude that everything is pre-decided? I can explain this in the following ...
-1
votes
2answers
114 views
Can deterministic world view be denied by anything other than quantum mechanics
If we ignored quantum mechanics and looked at the world with a deterministic Newtonian view. Does not that mean that there is no randomness and that if all the information of the state of the universe ...
12
votes
3answers
1k views
Is the universe fundamentally deterministic?
I'm not sure if this is the right place to ask this question. I realise that this maybe a borderline philosophical question at this point in time, therefore feel free to close this question if you ...
7
votes
7answers
448 views
Why Quantum Mechanics as a non-fundamental effective theory?
My question: What (physical or mathematical) reasons (not philosophical) do some physicists ('t Hooft, Penrose, Smolin,...) argue/have in order to think that Quantum Mechanics could be substituted by ...
4
votes
3answers
255 views
+100
Determinism, classical probabilities, and/or quantum mechanics?
[I]f you want a universe with certain very generic properties, you seem forced to one of three choices: (1) determinism, (2) classical probabilities, or (3) quantum mechanics. [My emphasis.]
...
2
votes
5answers
219 views
How do we know that there isn't a classical solution to the measurement problem/Quantum Mechanical uncertainty?
It was mentioned to me that it can be shown that there is no classical explanation for the uncertainty in Quantum Mechanics -- i.e. that there are no hidden workings that we have just not yet seen, ...
5
votes
2answers
141 views
Bell's Theorem graph
My friends and I got into an argument about determinism, and I brought up that quantum events are random. But I couldn't prove it.
I found the Wikipedia page on Bell's theorem, which seems to imply ...
4
votes
4answers
220 views
Are photons deterministic?
I propose the following scenario:
At $t=0$, a photon is emitted from a star. At $t=n$, said photon is received and interpreted by some detector.
My question is whether or not it is accurate to say ...
13
votes
3answers
392 views
Does quantum computing rely on particular interpretations of quantum mechanics?
It is my understanding that quantum computing relies on quantum superposition and entanglement to work--qbits must exist in all states simultaneously before giving a particular result when observed.
...
1
vote
2answers
158 views
Is the movement of electrons truly random?
The result of rolling dice is considered pseudo-random because it depends on an almost endless list of factors (how you roll it, the terrain it lands on, etc.), but it is not TRULY random. Is the ...
1
vote
1answer
97 views
reversible cellular automata
Let's suppose a cellular automaton has a value $b(r,t)$ belongs to $Q$ at site $r$ and time $t$, where $Q$ is the set of possible states at each site. Let $N(r, t)$ be the values of the states of all ...
0
votes
2answers
131 views
What are hidden variables exactly?
What are hidden variables in quantum mechanics? I am aware there are many types but what exactly do they mean or even "do" exactly?
Do they mean that the quantum indeterminacy becomes hidden but ...
3
votes
3answers
199 views
Are quantum mechanics and determinism actually irreconcilable? [closed]
As a preface, I am not a physicist. I'm simply interested in abstract physics and fundamental principles of the universe and such. As such, if you can provide an answer for the layman (as ...
2
votes
2answers
269 views
Is 't Hooft's Determinism based on the holographic principle?
Does 't Hooft's determinism work need the holographic principle in order to work or is it just an extension of his work?
-3
votes
1answer
227 views
Quantum superposition and fate [closed]
First of all, sorry for my knowledge of physics. Maybe my question is too obvious but I want to ask it.
I am thinking about fate and if it exist or no.
According to my assumption if I take any ...
4
votes
3answers
416 views
How does Bell's theorem rule out the possibility of local hidden variables?
It seems to be common consensus that the world is non-deterministic and this is proved by Bell's theorem.
But even though Bell's experiments proved that the theory of quantum mechanics work, How does ...
6
votes
1answer
295 views
What are the 't Hooft papers about classical models underlying QM?
Gerard 't Hooft states in his webpage
I have mathematically sound equations that show how classical models generate quantum mechanics.
and there are some interesting discussions here in ...
3
votes
1answer
184 views
In QM, does random data “come from anywhere”? Also, what are the properties of the data?
I have only taken a basic quantum mechanics course (this book, so you know where I'm coming from), but I've been wondering about something.
If we set up a quantum system in a known state and take a ...
4
votes
4answers
194 views
Are a quantum mechanical system a chaotic (yet deterministic) system?
The title is slightly misleading. I really want to know if the randomness and probabilities observed in quantum mechanics is really just the result of a chaotic (yet deterministic) system.
If it is ...
4
votes
0answers
328 views
Is there any simple quantum model by Gerard 't Hooft which can explain the double slit experiment?
This question is directed to Prof. 't Hooft and anybody who is familiar with his papers. It is a reaction to Prof. 't Hooft's question why nobody is excited about his classical models for quantum ...
4
votes
0answers
100 views
Is it possible to reproduce the energy spectrum of quantum chaos using classical cellular automata?
Is it possible to reproduce the energy spectrum of quantum chaos using classical cellular automata? It's hardly impressive to reproduce harmonic oscillators.
36
votes
7answers
5k views
Why do people categorically dismiss some simple quantum models?
Deterministic models. Clarification of the question:
The problem with these blogs is that people are inclined to start yelling at each other (I admit, I got infected and it's difficult not to raise ...
18
votes
1answer
1k views
In 't Hooft beable models, do measurements keep states classical?
This is a questions on 't Hooft's beable models (see here: Discreteness and Determinism in Superstrings?) for quantum mechanics, and the goal is to understand to what extent these succeed in ...
1
vote
4answers
549 views
Can superdeterminism resolve contextuality, entanglement and Shor's algorithm in quantum mechanics?
Superdeterminism is the idea that the apparent freedom for the choice of experimental apparatuses and their settings are nothing but an illusion. Contextuality is the dependence of the properties of a ...
0
votes
0answers
44 views
Which subject matter for those experiment is on that help Bohr win over the Einstein-Bohr debate? [closed]
Which subject matter for those experiment is on that help Bohr win over the Einstein-Bohr debate?
List the name of those experiment and categorize them by subject please, if time is available please ...
5
votes
0answers
167 views
Cellular automata rules for quantum mechanics
My limited understanding of quantum theory is that a quantum system is completely described by its wave function, which deterministically evolves according to Schrödinger's equation until wave ...
5
votes
3answers
331 views
What is happening over the 15 minutes it takes a neutron to decay?
I've read that free neutrons decay into a proton, electron and neutrino with an average lifespan of about 15 minutes. Is there anything physically different about a neutron that has existed for 14 ...
9
votes
4answers
637 views
Can quantum mechanics really be the same as underlying deterministic theory?
I am perplexed by recent papers by 't Hooft giving an explicit construction for an underlying deterministic theory based on integers that is indistinguishable from quantum mechanics at experimentally ...
22
votes
10answers
5k views
Discreteness and Determinism in Superstrings?
So Gerard 't Hooft has a brand new paper (thanks to Mitchell Porter for making me aware of it) so this is somewhat of a expansion to the question I posed on this site a month or so ago regarding 't ...
11
votes
5answers
2k views
Why do people rule out local hidden variables?
I bet the automatic response to my question would be "Bells Theorem" and of course I am not disputing Bells proof, I am however uncertain of one of his assumptions.
The so called "no conspiracy" ...
5
votes
3answers
693 views
Can randomness exist?
Considering every cause has an action, how can anything be random? For something to happen, it must have a cause and through that definition it can't be random.
Considering this why are many quantum ...
1
vote
2answers
498 views
If randomness doesn't exist, how come the universe isn't a perfect sphere with predictable distribution of matter?
I'm presuming that the scientific community pretty much agrees that randomness doesn't exits, and that everything has a cause. Please correct me if I'm wrong, I've heard of quantum mechanics, but as ...
4
votes
1answer
137 views
Event-by-Event Simulation of Quantum Phenomena
I just recently stumbled over
http://rugth30.phys.rug.nl/dlm/
and
http://www.sbfisica.org.br/bjp/files/v38_26.pdf
As the title suggests these are presentations of mathematical models capable of ...
3
votes
2answers
462 views
Can cellular automata be reconcilied with quantum mechanics?
CAs are deterministic representations of the universe, which, according to the Bell's inequality are not entirely accurate. Cells interact "locally" (only with the closest neighbours), while quantum ...
2
votes
4answers
334 views
How can indeterminacy in quantum mechanics be derived from lack of ability to observe a cause?
I don't get this part of quantum mechanics.
I get the part that you can't observe particles and not affect their behavior because you are shooting photons to them while you are observing them, but ...
10
votes
5answers
1k views
Deterministic quantum mechanics
I came across a very recent paper by Gerard 't Hooft
The abstract says:
It is often claimed that the collapse of the wave function and Born's rule to interpret the square of the norm as a ...
13
votes
5answers
796 views
What combinations of realism, non-locality, and contextuality are ruled out in quantum theory?
Bell's inequality theorem, along with experimental evidence, shows that we cannot have both realism and locality. While I don't fully understand it, Leggett's inequality takes this a step further and ...
7
votes
4answers
636 views
By what mechanism do quantum effects become observable in normal life at the macroscopic level?
By what mechanism do quantum effects become observable in normal life at the macroscopic level? For instance, when two molecules "collide" is the momentum a probabilistic event wherein the end state ...
-2
votes
2answers
328 views
Chaos and quantum physics: How many ways can a bonfire burn?
I'm interested in the extent to which quantum physical effects are seen at a macroscopic level. I might get some of the physics wrong, but I think I'll get it close enough that I can ask the ...
19
votes
4answers
1k views
Is Stephen Wolfram's NKS, an attempt to explain the universe with cellular automata, in conflict with Bell's Theorem?
Stephen Wolfram's A New Kind of Science (NKS) hit the bookstores in 2002 with maximum hype.
His thesis is that the laws of physics can be generated by various cellular automata--simple programs ...
15
votes
10answers
878 views
Why can't the outcome of a QM measurement be calculated a-priori?
Quantum Mechanics is very successful in determining the overall statistical distribution of many measurements of the same process.
On the other hand, it is completely clueless in determining the ...
5
votes
6answers
827 views
Will Determinism be ever possible?
What are the main problems that we need to solve to prove Laplace's determinism correct and overcome the Uncertainty principle?
