Why is the smallest energy transfer in quantum measurement uncontrollable?

[gianeshwar]

Dear Friends!
Root cause of indeterminacy in quantum measurement process is that the smallest energy transfer happens via the emission or absorption of a single photon,an irreducible and uncontrollable process.
I want to understand it more convincingly.

 

[Khashishi]

No, indeterminacy has nothing to do with smallest energy transfer.

 

[Jilang]

Rather than the energy transfer, would it be correct to say that it is the "action" that has a minimum?

 

[Nugatory]

Rather than the energy transfer, would it be correct to say that it is the "action" that has a minimum?

No, that's not right either.

 

[Nugatory]

I want to understand it more convincingly.

There are a bunch of threads here on quantum indeterminacy which will give you the details.

The quick answer, however, is that the probabilistic nature of quantum mechanics is a postulate. It is possible that there is some deeper deterministic theory underneath quantum mechanics (similar to the way that a tossed coin appears to land heads or tails at random, but in fact its trajectory is deterministic and could in principle be calculated from Newtob's laws and the initial conditions). However, googling for "Bell's Theorem" will quickly convince you that if such a deeper theory exists, it will be no less weird than QM.