Questions tagged [bohmian-mechanics]

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What is the ontological status of gauge fields/virtual particles/electron radiation in Dirac sea model of Bohmian QFT?

I have been reading about this model - it is a model without actual particle creation or annihilation, particles move deterministically according to Bohm's law, the Dirac sea is used to explain away ...
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1answer
107 views

In Bohmian mechanics does a pilot wave have a mass and what is the mass?

In Bohmian mechanics does a pilot wave have a mass and what is the mass?
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2answers
154 views

Why is Pilot Wave Theory nonlocal?

I have read that the Pilot Wave Theory is nonlocal and can therefore be excluded. Why is the PW Theory nonlocal? Isn't QM also nonlocal, as we can see it from entanglement? I already googled the ...
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1answer
39 views

Wigner friend experiment with qbits

Suppose that in his isolated box, Wigner's friend measures a qbit in state $|→⟩=\dfrac{|↑⟩+|↓⟩}{\sqrt{2}}$ along the vertical axe. Then, he sends Wigner (who remains outside the box) a qbit in the ...
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22 views

How can Valentini's subquantum measurement work if particles cannot affect the wavefunction?

In Brown and Wallace's 2005 paper, it is argued that the corpuscles in Bohmian mechanics are ontologically unnecessary, as they play no role in solving the measurement problem. Instead, they argue, ...
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19 views

How does a time-like vector field reduce to a vector field with a foliation in Bohmian Mechanics?

I was reading section 5 of the document below: "We thus sketch here a possible relativistic generalization of the Bohmian dynamics that does not require a foliation, but merely a time-like ...
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1answer
75 views

How does the Bohm interpretation/pilot wave theory explain particles getting spontaneously created and destroyed?

Pilot wave theory says that classical particles are riding on waves. Quantum field theory says that particles are the excitations of a field. Both of these descriptions seem like essentially the same ...
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26 views

Particles in an interferometer in a gravitational field

Let's assume one has a standard interferometer, consisting of an incoming beam which gets splitted in beam I and II and then culminated again. Now the interferometer is placed in a gravitational field,...
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1answer
26 views

Different expressions for the guidance equation - how to show equivalence?

I assume it's not too difficult but I don't know how to show the equivalence between two different expressions of the guidance equation in Bohmian mechanics. The following is the form I already ...
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1answer
52 views

Why can we not know the position of a particle in Bohmian Mechanics?

I can't seem to understand this. In Bohmian mechanics, particles have definite positions and are guided by a wave function governed deterministically by Schrodinger's equation. So if you knew a ...
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47 views

What does happen if we use a delta function for density on the De Broglie–Bohm theory?

I was reading Pilot wave theory and De Broglie–Bohm theory pages on Wikipedia that I found how similar they are comparing to classical physics and I wondered what happens if we just replace the ...
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1answer
109 views

Spacetime as a medium for electromagnetic waves? [closed]

We typically break waves into two separate types mechanical waves and electromagnetic waves and treat them entirely differently based primarily on the observation that electromagnetic waves don't ...
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1answer
80 views

If we know the inital state of a quantum field can we predict its later state?

If we have the wavefunctional $\Phi[\psi]$ which tells us the probability density for finding $\psi$. Let's say we know the exact field state at $t=0;$ $\psi(x,0)$. Can we use the wavefunctional $\Phi[...
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1answer
139 views

What are the objections to stochastic quantum mechanics?

I recently discovered the stochastic interpretation of quantum mechanics, which is different from the De Broglie-Bohm theory The best article I found on it was very much a comparison of the two by ...
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1answer
72 views

Regarding Pilot Wave Theory [duplicate]

Not as popular as the Copenhagen interpretation perhaps, but I'm truly intrigues to know the intricacies of the de Broglie-Bohm Theory. However, I could find absolutely no source which could teach me ...
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1answer
161 views

How does Bohmian mechanics explain the effect of information in the double-slit experiment?

De Broglie and David Bohm found a method (1952) that explains the double-slit experiment and its variations, which are so central to QM, in an intuitive way without appeal to probability, wave-...
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53 views

How do electrons stay in orbitals in Bohmian Mechanics?

I've been reading various realist interpretations of quantum mechanics and in Bohmian Mechanics, I found that the "wave" aspect of a quantum particle is removed from the particle to preserve ...
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2answers
97 views

Is it possible to split a photon into two? And if so, how would Bohmian mechanics explain that?

In standard QM, photons are waves, but in Bohmian mechanics, photons are particles being guided by waves. So, if you split the wave, do you also split the particle? How would that work?
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1answer
89 views

Resolving the measurement problem with mathematical theorems? [closed]

The key debate, around the measurement problem is whether collapse should be interpreted as a physical process(Bohmian Mechanics) or as an immaterial process(e.g. Copenhagen Interpretation, ...
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106 views

Separation of Klein-Gordon-/Dirac-equation (Bohmian-mechanics)

With the function $R{ e }^{ \frac { i }{ \hbar } S }$ one can separate the Schrödinger equation $$i \hbar \frac{\partial \psi}{\partial t}=\left(-\frac{\hbar^{2}}{2 m} \nabla^{2}+V\right) \psi$$ into ...
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How does the superposition of states come up in Bohmian Mechanics?

In Bohmian Mechanics, it assumes a universal wave field in which particle's motion can be calculated using Newton's law of motion: \begin{equation} m\frac{d^{2}x}{dt^{2}} = - \nabla(V+U) \end{...
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48 views

Can the pilot wave in Bohmian mechanics be derived from velocity-dependent potential?

In the derivation of the pilot wave, Bohm wrote the Schrodinger equation in this way: \begin{equation} \frac{\partial{S}}{\partial{t}} + \frac{(\nabla{S})^2}{2m} + V(x,t) - \frac{\hbar^2}{4m}[\frac{...
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80 views

De-Broglie Wavelength and the Pilot Wave Theory

I researched a lot of questions on De-Broglie waves on this website and discovered a dense fog of confusion amongst everyone. Louis De-Broglie proposed "Matter Waves" and a simple equation describing ...
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44 views

Relativistic Bohmian Mechanics [duplicate]

Is there a relativistic interpretation of Bohmian Mechanics, akin to QFT for the Copenhagen Interpretation?
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173 views

Bohmian vs Copenhagen Interpretation

Is there any experiment that could settle the debate between De Broglie - Bohm Pilot Wave Theory and the Copenhagen Interpretation?
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61 views

Is 'measurement' deterministic in the pilot wave theory?

From what I read, measurements in pilot wave theory affect the particles as well as the guiding waves. Is it a random process or is everything deterministic according to the theory?
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1answer
243 views

Derivation of the Guiding Wave equation

I've been searching around the internet for a derivation of the guiding wave equation, but I can't find a derivation anywhere. I know that Bohmian Mechanics is not a mainstream idea but I was hoping ...
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91 views

Does this thought experiment proves that Standard Quantum Mechanics and Pilot Wave Theory make different predictions?

Here is a thought experiment that is supposed to show that standard quantum mechanics and pilot wave theory do not make the same prediction : Take the double slit experiment, and add a detector in ...
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70 views

In the pilot-wave theory, is the quantum potential moving electrons randomly inside atoms?

As we know, in the pilot-wave theory (Bohmian mechanics), particles are guided on certain trajectories by the wavefunction. Here (In Bohmian mechanics, do electrons move inside an atom?) I asked about ...
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55 views

In Bohmian mechanics, it the uncertainty due to non-locality?

In the pilot-wave interpretation of quantum mechanics, each particle is driven by the pilot wave on the universal configuration space, and therefore its trajectory is determined nonlocally, and ...
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3answers
255 views

In Bohmian mechanics, do electrons move inside an atom?

Look at http://www.bohmian-mechanics.net/whatisbm_pictures_hydrogen.html. It is mentioned that in the rest states of a bound electron, the position of the electron is stationary, since the ...
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1answer
59 views

Bosons in Bohmian mechanics

I would like to know if even bosons in the same quantum state, like in a BEC, can be discerned (by their positions) in Bohm's mechanics.
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2answers
89 views

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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102 views

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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2answers
213 views

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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14answers
8k 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 ...
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2answers
594 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 ...
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2answers
220 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 ...
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1answer
240 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 ...
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118 views

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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2answers
74 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 ...
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1answer
120 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 ...
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108 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} = -\...
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1answer
158 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 ...
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82 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 ...
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1answer
281 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
250 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 ...
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234 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 ...
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1answer
69 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 ...
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2answers
450 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 ...