The quantum-interpretations tag has no wiki summary.
0
votes
1answer
91 views
Does the measurement on a subatomic particle give its mass value?
No doubt I am wondering about the Young's double slit phenomena. If we observe or measure the properties of a subatomic particle, we are able to know its mass, velocity and it comes to existence. So ...
2
votes
5answers
222 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, ...
3
votes
4answers
280 views
How do we show that no hidden variable theories can replace QM?
I've always hit two big stumbling blocks in conceiving of the proof or disproof of hidden variable theories as being even valid idea, let alone an answerable question... I feel I must be ...
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.]
...
0
votes
1answer
124 views
The System and the Measuring Gadget
In Quantum Mechanics the value of an observable results from the interaction between the "system" with the "Measuring gadget".
But when the experimenter[or the technologist concerned] is ...
4
votes
5answers
879 views
Connection between quantum physics and consciousness
Can someone explain the quantum physics-consciousness connection? In the double slit or quantum eraser experiments, the system behaves as a whole, with some apparent time independent traits. Invoking ...
2
votes
5answers
233 views
Schrodinger's cat experiment
What's wrong in taking the cat as an observer in Schrodinger's experiment? Plz kindly elaborate! And if possible also describe about possible logics if the question bears the answer No.
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 ...
1
vote
0answers
51 views
Interpretation of theoretical Schrodinger's cat experiment [duplicate]
I do appreciate how to interpret the famous theoretical experiment of Schrodinger's cat experiment in the following situation:
A Lab has a closed box with a dead or live cat and and a person who ...
-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 ...
9
votes
2answers
349 views
Is the preferred basis problem solved?
Once and for all: Is the preferred basis problem in the Everettian Interpretation of QM considered solved by decoherence or not?
THere are a few people who claim that it's not, but it seems the vast ...
2
votes
2answers
140 views
Was TP Singh right to say that a theory of quantum gravity necessitates the Copenhagen Interpretation?
http://iopscience.iop.org/1742-6596/174/1/012024
In the above link we see TP Singh arguing that only Copenhagen will work for a theory of quantum gravity.
Some of his key points are "quantum theory ...
16
votes
4answers
305 views
Is every quantum measurement reducible to measurements of position and time?
I am currently studying Path Integrals and was unable to resolve the following problem. In the famous book Quantum Mechanics and Path Integrals, written by Feynman and Hibbs, it says (at the beginning ...
3
votes
3answers
426 views
Is the wave function objective or subjective?
Here is a question I am curious about.
Is the wave function objective or subjective, or is such a question meaningless?
Conventionally, subjectivity is as follows: if a quantity is subjective then ...
1
vote
0answers
31 views
Is it possible to detect subjective decoherence? If yes, how?
In his paper from 1994 Thomas Breuer describes a phenomenon of subjective decoherence (p. 43). I wonder whether it can be measured, and if yes, how.
I also wonder whether it would allow to create an ...
2
votes
2answers
80 views
Interpretation of de Broglie wave
Until what point can the de Broglie wave be thought as a real wave?
I mean, is it made of something?
What amplitude does it have? Is it a sine wave?
How can it be related to the wavefunction of the ...
-2
votes
0answers
63 views
What is the state of contempoary Quantum Physics as a discipline? [closed]
Sometimes I take the time to read textbooks and go to talks about Quantum Physics. Most of the time I do that I am appalled at how... Badly people seem to understand QM.
I do not have formal ...
2
votes
2answers
55 views
Is it possible to determine the state or values of something without measuring it
To give context to this question, I am currently looking into non-locality / hidden variables / Bell's Theorem, EPR / etc.
I've noticed the assertion that the values / state of something when ...
0
votes
0answers
23 views
Showing that the CHSH inequality is not violated
I can usually work out whether CHSH inequality is violated when the observables that we are measuring and the state we are in is given explicitly, but I'm struggling with the generality of the ...
3
votes
1answer
82 views
Motivation for Wigner Phase Space Distribution
Most sources say that Wigner distribution acts like a joint phase-space distribution in quantum mechanics and this is justified by the formula
...
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 ...
6
votes
1answer
95 views
What experiments have been proposed to discriminate between interpretations of quantum mechanics?
There are a lot of potentially correct interpretations of quantum mechanics. While I've heard descriptions of a lot of them, I've never heard of an experiment being done to test any of them aside from ...
7
votes
2answers
251 views
Should it be obvious that independent quantum states are composed by taking the tensor product?
My text introduces multi-quibt quantum states with the example of a state that can be "factored" into two (non-entangled) substates. It then goes on to suggest that it should be obvious1 that the ...
4
votes
3answers
560 views
Is contextuality required in quantum mechanics?
I still don't really understand what contextuality means in reference to quantum mechanics. If someone could give a clear definition that would be great. It sounds like it means you can't always ...
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 ...
1
vote
0answers
40 views
What is the difference between Cramer and Vaidman?
Two very interesting new papers on arXiv last night by Lev Vaidman and friends lead me to ask about the differences between Cramer's transactional interpretation of quantum mechanics (TIQM) and the ...
1
vote
1answer
70 views
Is Dirac's description of a photon in a split beam still seen as correct today?
This comes from the Interference of Photons section in the book The Principles of Quantum Mechanics by P Dirac:
We shall discuss the description which quantum mechanics provides of the ...
0
votes
0answers
58 views
Hamiltonian matrix propertu
A professor made an statement to prove the variational theorem:
Because the Hamiltonian (H operator of quantum physics) is diagonal in its own eigenfunction, the terms in $\left \langle \Phi _{m} ...
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" ...
4
votes
1answer
118 views
Quantum Mechanics - Hidden Variables
In Steven Weinberg's Lecture on Quantum Mechanics (p. 342), he writes:
The correlation between the spins of the two particles can be
expressed as the average value of the product of the ...
0
votes
2answers
86 views
EPR vs. EPRBB? Why can't we perform the original EPR experiment?
The EPR gedanken experiment was invented by Einstein Podolsky and Rosen in 1935.
It involved positions and momenta. In 1957, Bohm revised this gedanken experiment into one involving spins, or ...
0
votes
0answers
14 views
Quantum Corral Modulation
What is one in the no two when; the magnetic field modulates a quantum corral? Why is the double revealed when a magnetic field is activated under a quantum corral?
-1
votes
1answer
326 views
EPR-type experiments and faster-than-light communication using interference effects as signaling mechanism
I understand that faster-than-light communication is impossible when making single measurements, because the outcome of each measurement is random. However, shouldn't measurement on one side collapse ...
0
votes
2answers
83 views
If inherent randomness exist in quantum mechanics, what then of eternalism implied by relativity?
I am nothing but a curious layman so don't go too technical on me.
First of all, I am well aware that a lot of people consider the question of determinism vs indeterminism to be unsolved and others ...
0
votes
1answer
68 views
Why is the energy spectrum of bound QM plane wave continuous?
Please explain it in the context of this task: we have a potential barrier that looks like $\prod$, with $E<U$. There are 3 regions:
1) no field
2) barrier
3) no field
Solution could be ...
0
votes
1answer
91 views
Does quantum reversibility require many worlds?
The source S sends a photon into the beam splitter below.
There is a 50% chance that it will be detected at A and a 50% chance it will be detected at B.
...
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.
...
2
votes
2answers
172 views
What does the Copenhagen interpretation say about the position of a particle before measurement?
Suppose there is a particle in space. When we measure the position of that particle, we get a particular value with a probability that can be calculated from the wave function. But, according to the ...
3
votes
1answer
139 views
Question about Wigner's friend
The Wigner's friend thought experiment can be used to understand non-realism in quantum mechanics. For anyone not familiar, the thought experiment involves two researchers observing an experiment at ...
2
votes
0answers
48 views
Why should multiple versions of a weak measurement preclude it from being a measurement of intrinsic properties of some system
I've been trying to understand Stephen Parrott's criticisms of weak measurement, outlined most concisely here: http://arxiv.org/abs/0909.0295
One of his major criticisms is that weak measurement is ...
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 ...
2
votes
2answers
110 views
Cardinality of the Universes Set
No expert by any means, but sometimes, in different contexts the term multiverse used. In quantum mechanics, some say that it is possible that there are actually many universes where all the possible ...
6
votes
1answer
365 views
't Hooft for laypersons
I have looked at some of 't Hooft's recent papers and, unfortunately, they are well beyond my current level of comprehension. The same holds for the discussions that took place on this website. (See, ...
3
votes
1answer
370 views
Bohmian loophole in PBR-like theorems
I'm reviving and expanding this question, because of the new paper today, by Aaronson et al. The more general question is:
How does quantum-potential Bohmian mechanics relate to no-go theorems for ...
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 ...
1
vote
3answers
182 views
Is a quantum system mandatory for generating true random sequence?
Is a quantum system necessary if we want to generate true random sequence? The mathematical framework used for classical mechanics doesn't involve any random value. But the mathematical framework of ...
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 ...
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 ...
1
vote
0answers
113 views
Is there any way to prove/disprove we are in a computer simulation? [closed]
Is there any way to prove/disprove we are in a computer simulation in some transcendental reality?
Even if we are "really" not in a simulation, can we ever prove so? Even if some messages/evidence ...
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 ...
