On Monday, March 11, 2019 at 2:41:13 PM UTC-6, John Clark wrote:
>
>
> On Mon, Mar 11, 2019 at 12:18 PM <[email protected] <javascript:>> 
> wrote:
>
> >>We can calculate the wave function exactly but the wave function does 
>>> not determine exactly how matter will behave. 
>>>
>>
>> *That's precisely my point. If we can't determine exactly how matter will 
>> behave, how can we go back in time to reconstruct the original state for 
>> single trials. If we can't do that, then QM inherently contradicts 
>> determinism, so why make an issue about BH information loss? AG*
>>
>
>
> Schrodinger says If you know what the wave function of a particle is now 
> then you can predict what the wave function will be tomorrow and determine 
> what it was yesterday. Even more important Schrodinger says his function is 
> unitary, that means probabilities are conserved, but that can only happen 
> if information is conserved. 
>
> For the very idea of probability to make sense everything must add up to 
> exactly 1; if you calculate there is a 70% chance an electron will curve to 
> the left and a 40% chance it will curve to the right then you'll know 
> you've calculated nonsense. Black Holes seem to destroy information but if 
> so then the Schrodinger Wave Function can't be unitary and thus is total 
> nonsense, but it has been tested many many times and it always works so 
> it can't be total nonsense. That is the paradox.
>

*How is information preserved in usual QM? If a particle bends in one 
direction, and you play the wf back in time, how do you recover a particle 
which will bend in the same direction, exactly? AG *

>
> If all this confused you welcome to the club, nobody knows how to resolve 
> this paradox but when they do they'll probably resolve the conflict between 
> General Relativity and Quantum Mechanics too.  
>
> John K Clark
>
>
>>

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