On Sunday, September 8, 2019 at 9:10:09 AM UTC-5, Lawrence Crowell wrote:
>
> On Sunday, September 8, 2019 at 6:00:35 AM UTC-5, Bruno Marchal wrote:
>>
>>
>> On 7 Sep 2019, at 17:17, Philip Thrift <[email protected]> wrote:
>>
>>
>>
>> On Saturday, September 7, 2019 at 9:25:59 AM UTC-5, Lawrence Crowell 
>> wrote:
>>>
>>> On Saturday, September 7, 2019 at 4:09:27 AM UTC-5, John Clark wrote:
>>>>
>>>>
>>>> On Sat, Sep 7, 2019 'Brent Meeker' via Everything List <
>>>> [email protected]> wrote:
>>>>
>>>> *>> Sean Carroll is on a nationwide speaking tour now evangelizing Many 
>>>>> Worlds. What is the predictive power of Many Worlds?*
>>>>>
>>>>> > None, unless someone can figure out how to derive Born's rule from 
>>>>> it...which I think is impossible. 
>>>>>
>>>>
>>>> Many Worlds predicts that the best any observer will be able to do is 
>>>> make probabilistic  predictions, and Gleason's theorem says that in 3 
>>>> spatial dimensions only the square of Schrodinger's wave (the Born rule), 
>>>> and not the cube or anything else, can yield a probability without 
>>>> inconsistencies.
>>>>
>>>> John K Clark
>>>>
>>>
>>> Gleason's theorem is sort of a special case of Born rule for the case an 
>>> operator is the unit operator. There is an interesting chase after the Born 
>>> rule, and some people do think that certain quantum interpretations give 
>>> the added axiomatic "boost" necessary to prove that. I am agnostic about 
>>> those claims. If this does turn out to be the case I would give the best 
>>> bet to either MWI or QuBism. 
>>>
>>> LC
>>>
>>
>>
>>
>>
>> If the best bet is  either MWI or QuBism  then theoretical physics is 
>> indeed doomed. 
>>
>>
>> Yes. But theoretical physics is not doomed, only physicalism, or the idea 
>> that physics is the fundamental science. As such it is not doomed, but 
>> explain by something non physical, simpler, even if transcendent.
>>
>> Bruno
>>
>>
>>
> I wrote this not with the expectation that the Born rule will be proven 
> within either of these interpretations. I think the Born rule should likely 
> be proven, proven to be false, or shown to be unprovable, outside the 
> context of any interpretation. My statement is just that if it is proven 
> within the context of an interpretation these two might have the greatest 
> plausibility.
>
> LC
>  
>
>>
>>
>>

My statement is just that if it is proven within the context of an 
interpretation these two might have the greatest plausibility.

But

"We provide a derivation of the Born Rule in the context of the Everett 
(ManyWorlds) approach to quantum mechanics."

https://arxiv.org/pdf/1405.7907.pdf 

So what is the issue?

@philipthrift

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