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Lumo's attack on dBB continues
#10
(08-18-2016, 06:28 PM)user7348 Wrote: I'm looking at Bohm (1952). On page 171 he outlines 3 ad hoc assumptions which are needed to guarantee equivalence with quantum mechanics. (3) says that the probability density of position is given by the usual square of the magnitude of the wave function. It then says that this is due to not knowing the initial conditions of the particle. I do not understand why the initial conditions of the particle are unknown.
Yes, Bohm 1952 requires the assumption that the wave function is initially in quantum equilibrium.

But this is no longer an independent assumption. Today we have the Valentini's subquantum H-theorem, which shows that the quantum equlibrium will be reached in analogy to Boltzmann's H-theorem for thermal equilibrium. This has been also supported by numerical computations by Valentini and Westman. See https://en.wikipedia.org/wiki/Antony_Valentini for references.
(08-18-2016, 06:28 PM)user7348 Wrote: Furthermore, if the wavefunction is a position eigenstate which always occurs after a position measurement, then P(x) is 1 at a specific location and 0 everywhere else so that the precise location of the position is well defined which undermines the reasoning of (3).
Of course, the wavefunction is not a "position eigenstate". dBB theory is a realistic theory, so it is assumed to describe what really exists, not what is measured.
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Messages In This Thread
Lumo's attack on dBB continues - by Schmelzer - 05-16-2016, 08:56 AM
RE: Lumo's attack on dBB continues - by Schmelzer - 05-16-2016, 11:26 AM
RE: Lumo's attack on dBB continues - by Schmelzer - 05-20-2016, 08:44 PM
RE: Lumo's attack on dBB continues - by Schmelzer - 05-21-2016, 06:42 PM
RE: Lumo's attack on dBB continues - by Schmelzer - 05-22-2016, 06:54 PM
RE: Lumo's attack on dBB continues - by Schmelzer - 05-23-2016, 11:34 AM
RE: Lumo's attack on dBB continues - by user7348 - 08-18-2016, 06:28 PM
RE: Lumo's attack on dBB continues - by Schmelzer - 08-21-2016, 04:59 PM

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