Questions tagged [bohmian-mechanics]
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In a pilot-wave model, is knowing the position of the particle sufficient for predicting its behavior?
Suppose that we somehow exactly know the position of an electron before hitting the double-slit structure (for example we know it's 20cm away from the structure and it's closer to the left slit). In ...
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How does Bohmian Mechanics explain superconductivity?
I'm looking for sources that discuss how Bohmian Mechanics explains superconductivity. Are there still Cooper pairs? Phonons? I saw one vague reference to vortices, but no details. This is my first ...
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3answers
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Can quantum randomness be somehow explained by classical uncertainty? [closed]
In quantum mechanics, the outcome of each measurement is random, distributed according to the squared amplitude of the wave function obtained from the Schrodinger's equation. Now, can someone suggest ...
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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 ...
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2answers
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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 ...
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2answers
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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 ...
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1answer
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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 ...
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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 ...
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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 ...
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1answer
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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 ...
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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} = -\...
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1answer
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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 ...
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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 ...
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1answer
105 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, ...
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1answer
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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 ...
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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 ...
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1answer
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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 ...
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2answers
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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 ...
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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 ...
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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?
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1answer
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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 ...
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2answers
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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 ...
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1answer
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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 ...
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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", ...
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2answers
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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 ...
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1answer
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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 ...
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1answer
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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 ...
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2answers
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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 ...
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2answers
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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?
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1answer
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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 ...
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1answer
228 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 ...
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1answer
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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 ...
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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 ...
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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 ...
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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 ...
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2answers
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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?
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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 ...
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2answers
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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 ...
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3answers
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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 ...
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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 ...
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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 ...
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1answer
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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 ...
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3answers
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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?
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1answer
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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 ...
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1answer
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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 ...
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1answer
206 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
...
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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 ...
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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, ...
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1answer
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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 ...
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1answer
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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 ...
