Questions tagged [bohmian-mechanics]
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64 questions
31
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11answers
7k views
How could quantum effects occur in the early universe without an observer?
In inflationary cosmology, primordial quantum fluctuations in the process of inflation are considered responsible for the asymmetry and lumpiness of the universe that was shaped. However, according to ...
1
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2answers
336 views
Can particles popped into existence from the vacuum have electromagnetic effects on other particles?
I know my question might have problems, but I am curious about it. In quantum field theory, particle-antiparticle pairs continuously pop in and out of existence from vacuum. These particles have a ...
7
votes
2answers
104 views
What are the similarities/differences between the behaviors of Quantum particles and bouncing droplets? [duplicate]
Bouncing droplets on a fluid surface show many weird behaviors of the quantum world. Look at this for example:
https://arxiv.org/abs/1307.6920
They can show tunneling, double-slit interference ...
2
votes
1answer
55 views
Does (Tomas) Bohr's modified double slit argument really doom Couder's quantum/classical fluid dynamics analogy?
I'm just an amateur, probably why I find the de Broglie/Bohm/Couder approach to QM compelling. But Copenhagen struck back: in a coincidence, Bohr's grandson is a fluid physicist who claims that ...
3
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0answers
92 views
+50
Why does Bell's field theory model need to be stochastic on a space-time lattice?
In "Beables for quantum field theory", John Bell has presented a realistic interpretation of any fermionic quantum field theory, along the pilot-wave ideas. This model is formulated on a spatial lattice ...
0
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2answers
64 views
Can we have an arbitrary set of trajectories in Bohmian mechanics?
In Bohmian mechanics, the initial configurations and the pilot wave determine the future of the system. Given a set of initial positions for particles and a set of arbitrary trajectories, can we ...
0
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1answer
62 views
How did Big Bang determine the initial conditions of the universe?
My question is that how did the Big Bang determine the initial distribution of the particles and their wavefunctions? In theories like Bohmian mechanics or Many worlds, how was the universal ...
0
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0answers
25 views
Non-locality of the Madelung equations?
As far as I understand, the Madelung equations
$$
\frac{\partial \rho}{\partial t} + \nabla \cdot \rho \mathbf{u} = 0 \\
\frac{\partial \mathbf{u}}{\partial t} + \mathbf{u} \cdot \nabla \mathbf{u} = -\...
-1
votes
1answer
41 views
What is the shape of the initial universal wavefunction?
In the many-worlds theory and Bohmian mechanics, the universe has an "initial" "universal" wavefunction which then evolves according to the Schrodinger's equation and determines the future of the ...
2
votes
0answers
49 views
Does a pilot-wave theory need to be stochastic in a discrete space-time?
I have found an article about Bohmian mechanics on a lattice with discrete space and time, the link of which is given below:
https://arxiv.org/abs/1606.02883
Here the motion of quantum particles is ...
-1
votes
1answer
76 views
Pilot-Wave vs. Quantum Mechanics vs. String Theory [closed]
I wanted to know that are the main shortcomings of contemporary Pilot-Wave theory which is holding it back from dominating physics departments? To what extent is the facukty biase, do you think, ...
2
votes
1answer
54 views
Bohm's view of double-slit experiment, wave-particle duality
I gather that Bohm denies the notion that the act of measurement decides whether a photon will be a wave or a particle. Bohm's idea seems to be that the photon is always a particle with a real ...
1
vote
0answers
80 views
Would pilot-wave gravity reconcile Bohmian mechanics with relativity? [closed]
I was reading Can Bohmian mechanics be made relativistic? from 2016 that attempts to reconcile Bohmian mechanics with relativity. It’s conclusion says:
Is such a theory then fundamentally—and/or ...
0
votes
1answer
53 views
How much is the amount of uncertainty in initial positions in Bohmian Mechanics?
In Bohmian mechanics, it is believed that the randomness (uncertainty, lack of knowledge) which is seen in the outcome of experiments is due to the uncertainty in the initial particle positions at the ...
1
vote
2answers
319 views
Is Bohmian mechanics wrong in the case that space and time are quantized?
Bohmian mechanics assumes that particle trajectories are continuous. Also, it claims the random outcome of certain experiments (like the double-slit experiment) to be due to the random initial ...
1
vote
3answers
92 views
Accessible resources for learning Bohmian mechanics? (Undergrad)
I am an undergraudate physics and math major. For context, I've taken senior level quantum 1 as well as real and complex analysis. I'd be really interested in focusing on understanding the ...
0
votes
1answer
33 views
Do we have a potential (quantum) in Bohm quantum mechanics that is associated with the phase factor $S$?
In Bohm quantum mechanics when we express the wavefunction as $\psi= R \exp(iS/\hbar)$ a quantum potential that depends on R is found, is there another potential that depends on the phase function S?
0
votes
1answer
40 views
Could two particles be released in parallel to test if their quantum probability waves interact, showing whether pilot waves exist?
What if you just release two streams of particles next to each other in parallel? Then you don't even need the double slits. See if their waves interact, and you'll know whether pilot waves are real ...
3
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2answers
182 views
Does Bohmian mechanics really solve the measurement problem?
I'm working a lot on Bohmian mechanics related theories and just realised something that had escaped me until now but actually seems to throw a wrench in the core idea of the theory. I tried to ...
2
votes
1answer
50 views
Connection between theory of superconductivity and Bohmian mechanics
I stumbled upon an interesting chapter of Feynman Lectures about Superconductivity and was surprised to see that the equations of motion of the superconducting electron fluid (21.38 and 21.39) hold a ...
5
votes
0answers
288 views
Is Bohmian mechanics really incompatible with relativity?
This is something I've been wondering about. For those who don't know, Bohmian mechanics is an interpretation of quantum mechanics that is in the class of what are known as "hidden variable theories", ...
3
votes
2answers
189 views
Does the de Broglie-Bohm pilot wave theory make any new predictions?
I find the de Broglie-Bohm pilot wave theory interesting but what I still feel missing in the descriptions I could find so far is that it reformulates what we already know but nobody speaks of new ...
1
vote
1answer
61 views
Phase of a Wave and Phase Space
What relation does the phase of a wave have with the phase space? Namely, how are they related historically and/or physically?
P.S. if it helps, I came across this question while thinking about the ...
2
votes
1answer
536 views
Couder's walking droplets - what are issues of using its intuitions to interpret quantum analogoues? [duplicate]
There are these popular experiments with droplets having wave-particle duality, e.g. here is Veritasium video with 2.3M views, great webpage with materials and videos, a lecture by Couder.
Among ...
3
votes
2answers
189 views
Is it possible to form modern physics using entirely “classical” theory?
Each of the big theories of modern physics have a somewhat more "classical" equivalent, that is
The Lorentz aether theory for special relativity
The Bohm theory for quantum mechanics
Pauli-Fierz ...
-2
votes
2answers
182 views
In Pilot wave theory how far does the wave stretch?
The one thing I find difficult to understand is how far does the Pilot Wave extend. Does the Pilot Wave permeate through the entire universe?
-1
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1answer
399 views
If Pilot wave theory turns out to be the correct way of interpreting quantum mechanics what are the implications?
I've read a few articles on Pilot Wave theory. Part of the theory describes how particles have a deterministic path and particles can't be in two places at once. If this turned out to be true would ...
1
vote
1answer
210 views
In pilot wave theory where is the wave?
As a non specialist, for a single particle system it's easy to appreciate the concept of a pilot wave extending through all Euclidean space, guiding a particle which ends up at a location determined ...
2
votes
1answer
104 views
Is Bohmian quantum mechanics noncontextual and can it be tested?
Concerning to the different plausible modifications of Quantum Mechanics, we have the so-called Bohmian Quantum Mechanics. It is frequently stated that Bohmian Quantum Mechanics is non-local, but is ...
1
vote
1answer
76 views
Can two distinct quantum universes ever have the same configuration, and what does it mean for many-worlds? [closed]
First, I hear that, on a whiteboard, one may casually invert causality and run time in reverse.
Next, I hear that there are interpretations of QM, like Chaitin's Great Programmer interpretation or de ...
2
votes
0answers
138 views
Is Bohmian mechanics incompatible with Leggett inequality?
As far as I know violation of Bell's theorem is not a problem for De Broglie–Bohm theory because this theory is explicitly nonlocal; But since the violation of Leggett inequality is considered to ...
0
votes
0answers
67 views
Loschmidt's paradox in Bohmian Mechanics
In Bohmian mechanics, the position of the particles must have a random distribution given by $\rho = |\Psi|^2$, where $\Psi$ is the wave function, in order to be compatible with Born rule in standard ...
1
vote
2answers
384 views
How does the de Broglie-Bohm picture explain the double-slit experiment with single particles?
If the particle has a single well-defined trajectory in the de Broglie-Bohm theory, how come that the interference pattern still appears even with single particles?
-2
votes
1answer
352 views
Does Bell Inequality favor De Broglie-Bohm?
From a purely mathematical standpoint, does Bell Inequality favor De Broglie-Bohm over other interpretations of QM?
I have a superficial understanding of all this but it seems to me that Bell ...
0
votes
2answers
224 views
Numerical Tools and Related Resoures for Bohmian Mechanics
I am trying to do some simulations using the de Broglie - Bohm formalism and am wondering if there are computational tools that already exist in this area.
I generally use Python, but will consider ...
0
votes
3answers
287 views
The Bohm interpretation and Schrodinger's cat
I was wondering how the Bohm interpretation of quantum mechanics would affect the Schrodinger's cat experiment. Would it imply that the cat would be in one state and never in superposition, so the cat ...
7
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3answers
1k views
What is a 'wavicle?'
What is a wavicle? I learned in electronics class that electrons are little particles. In physics they even say that the electron orbits the nucleus thus exhibiting angular momentum. But in chemistry ...
10
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4answers
4k views
Why would Pilot-Wave be wrong?
If this question has already been asked or is super basic, apologies. I'm a physics novice and this is my first question on this side of the site.
In classical physics, waves and particles are ...
0
votes
1answer
95 views
What research (if any) is being done with regard to a hidden variable theory of quantum mechanics?
From Bell’s theorem and the Kochen-Specker theorem we know that any hidden variable model hoping to reproduce the predictions of quantum mechanics must be both non-local and contextual. What model ...
0
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3answers
139 views
In Bohmian Mechanics, is there a 1-to-1 relationship between particles and pilot waves?
In Bohmian Mechanics, do all particles have its own pilot wave, or can you have multiple particles on the same wave?
0
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0answers
38 views
Does particle bounced from the array of atoms sums their spins
Question is based on the ideas from
1) R. Feynman QED-Strange theory of Light. Light goes via all possible paths (e.g. reflects from all parts of the mirror.)
2) M. Kaku Visions. Photon bounced off ...
0
votes
1answer
759 views
If Pilot Wave Theory is non-local, how does the pilot wave change over time?
My understanding is that Bohmian Mechanics (pilot wave theory) is non-local, meaning that effects propagate faster than light. Are these effects in fact instantaneous in that model? How would an ...
7
votes
1answer
1k views
Pilot waves and quantum eraser; pilot wave simulation
I recently watched this video about the quantum eraser experiment on PBS spacetime: Link. Has an experiment like the quantum eraser been tried with the pilot wave theory, ie bouncing droplet ...
6
votes
1answer
202 views
Quantum momentum decomposition
Consider the time-dependent Schroedinger equation for a single non-relativistic particle with mass $m = 1$.
The kinetic energy of the system is
[ref]
$$
T := \tfrac{\hbar^2}{2} \int |\nabla \psi|^2 dx
...
0
votes
1answer
57 views
What happens with QM particle at constant velocity? [closed]
In QM particles have wavefunctions that disperse quite fast.
The FWHM for gaussian wavepacket increases in time as $\Delta x(t)= \Delta x_0\sqrt{1+(t/\tau)^2} $, $\tau=2m(\Delta x_0)^2/\hbar$
What ...
1
vote
2answers
407 views
De Broglie- Bohm Quantum Theory
From what I have read the Standard Model of Particle Physics uses quantum mechanics,special relativity, along with other assorted mathematics to make predictions and provide a framework for QED, QCD, ...
4
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1answer
646 views
The Madelung equations are Euler equations for quantum mechanics. What is the Lagrangian description of quantum hydrodynamics?
The Madelung equations of quantum mechanics suggest the hydrodynamic model of quantum mechanics (quantum mechanics is described as a fluid of universes in a multiverse, which, in the non-relativistic ...
6
votes
1answer
373 views
Calculate the entropy per atom in Bohmian Mechanics
Bohmian mechanics description of a large number of interacting atoms would require a large phase space due to the large number of classical degrees of freedom. The entropy per atom is given as the ...
4
votes
3answers
962 views
Is Bohmian Mechanics incompatible with loop corrections?
For those who continue to be unsatisfied with Quantum Mechanics (QM), Bohmian Mechanics (BM) is an alternative worth considering. It is sometimes claimed that BM is equivalent to QM, but Lubos Motl ...
3
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0answers
61 views
Surreal Trajectories in Bohmian Mechanics [duplicate]
In February of this year, articles started popping up describing the results reported in this paper by Mahler et al: http://advances.sciencemag.org/content/2/2/e1501466.abstract
Taken from this ...
