Do Empty Waves in Bohm Theory Evolve Differently Than Non-Empty Ones?

In summary, the Bohm's theory of QM considers an artificial universe with 1 H atom and a potential barrier. The particles of the H atom travel along the probability flow and are split into two identical packets when incident on the barrier. One packet contains the actual H atom (particles + Psi) and the other contains an 'empty H atom' (Psi only). The question is whether the change in shape of the packet with time is different for the actual and empty H atoms, and the answer is no. The calculation of the wave function remains the same as in standard quantum theory to maintain observational equivalence.
  • #1
camboy
42
1
I'm following a course in Bohm's theory of QM, and I'm trying to understand what happens to 'empty waves'.

Consider artificial universe: contains 1 H atom only and an external potential which is zero everywhere except at a little barrier.

The H atom particles are traveling along in their guiding wave packet, following the streamlines of the probability flow. The packet is incident on the barrier. The barrier is so shaped that the result is two identical packets, one reflected back, one transmitted through. The particles deterministically end up in one of the packets (50% chance either way).

Thus there is an actual H atom (particles + Psi) going one way, and an 'empty H atom' (Psi only) going the other.

My question is this:

Given that the positions of the particles appear in the Hamiltonian of the time-dependent Schrodinger equation, is the change in shape of the packet with time different for the actual and empty H atoms?

Cheers
 
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  • #2
camboy said:
Given that the positions of the particles appear in the Hamiltonian of the time-dependent Schrodinger equation, is the change in shape of the packet with time different for the actual and empty H atoms?
This is an excellent question!
The answer is - no.
Instead, you calculate the wave function in exactly the same way as without the Bohmian interpretation. Otherwise, you could not achieve the observational equivalence between Bohmian theory and standard quantum theory.
 

Related to Do Empty Waves in Bohm Theory Evolve Differently Than Non-Empty Ones?

1. What are empty waves in Bohm theory?

Empty waves in Bohm theory refer to the hypothetical wave-like properties of particles that are not currently observed or measured. These waves are considered "empty" because they do not contain any physical particles, but rather represent the potential behavior of particles in a given system.

2. How do empty waves differ from actual matter waves?

Empty waves are distinct from actual matter waves, which are observable and measurable. Matter waves have both particle-like and wave-like properties, while empty waves only have wave-like properties. Empty waves are used in Bohm theory to explain the behavior of particles that are not directly observed.

3. What is the significance of empty waves in Bohm theory?

Empty waves play a crucial role in Bohm theory, as they are used to explain the non-locality and deterministic behavior of particles at the quantum level. They also provide a potential explanation for the wave-particle duality of matter.

4. Can empty waves be observed or measured?

No, empty waves cannot be directly observed or measured. They are a theoretical construct used in Bohm theory to explain the behavior of particles at the quantum level.

5. Are empty waves accepted by the scientific community?

Empty waves are a controversial aspect of Bohm theory and are not widely accepted by the scientific community. While some physicists find them to be a useful tool in understanding the quantum world, others argue that they are unnecessary and do not have any empirical evidence to support them.

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