Is Direct Brute Force Quantization Possible for Equations of Motion?

  • Context: Graduate 
  • Thread starter Thread starter lokofer
  • Start date Start date
  • Tags Tags
    Force Quantization
Join the discussion
Ask a follow-up here, or get your own question answered by working scientists, mathematicians and engineers — people, not an autocomplete.
Real named experts · corrections over time · the nuance an AI answer skips
2 replies · 3K views
lokofer
Messages
104
Reaction score
0
"Brute force" quantization..

Let's suppose we have the "Equation of motions" for a particle:

[tex]F(y'',y',y,x)=0[/tex] my question is if exsit a "direct" method to apply quantization rules..for example simply stating that:

[tex]F(y'',y',y,x)| \psi (x) >=0[/tex] or something similar.

- I'm not talking about the usual method (you use the Hamiltonian operator to get the Wave function) but a method to "Quantize" everything without using Hamiltonians or Lagrangians only with the equation of motion and similar...thanks.
 
Physics news on Phys.org
The Hellman-feynman theorem deals with the quantum mechanics of forces, but no, there is no procedure which involves quantised forces.
 
Epicurus said:
The Hellman-feynman theorem deals with the quantum mechanics of forces, but no, there is no procedure which involves quantised forces.

Well, I don't know about that theorem, but I was once thinking about quantum mechanics as a probability fluidum (the Madelung interpretation), something I never published since I cannot believe it has not been done yet. In this case, let [tex]R^2[/tex] be the ``mass´´ density and [tex]\partial_{\mu} S[/tex] be the integrable fluid velocity field. Then, the traditional navier stokes equation is:
[tex]R^2 \partial_t \partial_{\alpha}S + R^2 \partial_{\beta} S \partial_{\beta} \left( \partial_{\alpha} S \right) = \frac{R^2}{m} F_{\alpha} - \partial_{\alpha} p + \partial^{\beta} T_{\beta \alpha}[/tex] and the usual continuity equation
[tex]\partial_t R^2 + \partial^{\alpha} \left( R^2 \partial_{\alpha} S \right) = 0[/tex]
Now, let the pressure [tex]p = - \frac{1}{2m^2} \left( R \partial_{\beta} \partial^{\beta }R - \frac{1}{3} \partial_{\beta} R \partial^{\beta} R \right)[/tex] and the stress tensor
[tex]T_{\alpha \beta} = - \frac{1}{m^2} \left( \partial_{\alpha}R \partial_{\beta} R - \frac{1}{3} \delta_{\alpha \beta} \partial_{\gamma} R \partial^{\gamma} R \right)[/tex] then it is easy to prove that
with [tex]F_{\alpha} = - \partial_{\alpha} V[/tex], the Navier Stokes equation gives rise to the Hamilton Jacobi equation of Bohmian mechanics. Hence, this provides a general scheme for quantization of particles in general force fields. If you definitely know this has not been done yet, give me a sign and I will post the ``paper'' on the arxiv.

It seems to me you cannot quantize general force fields (in the case of instantaneous action at a distance, there are no traveling waves, hence no particles), only those which can be derived from a (eventually distributional) field theory seem to be meaningful.

Careful
 
Last edited: