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Reversing time with a quantum computer (a fraction of a second)

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#1 ggiles

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Posted 13 March 2019 - 12:03 PM

Interesting article....

 

https://phys.org/new...se-quantum.html


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#2 llanitedave

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Posted 13 March 2019 - 11:47 PM

I wonder if it's actually reversing the arrow of time locally by accelerating the aging of the rest of the universe!

 

If so, I'm going to put a stop to it.  Otherwise, there'll be a whole generation of kids getting back ON my lawn!


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#3 gavinm

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Posted 14 March 2019 - 01:12 AM

I struggled to get up this morning.. this explains it...


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#4 DaveC2042

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Posted 14 March 2019 - 07:36 PM

I have to say this didn't make any sense to me.

 

As far as I can tell all they are doing is arranging something very carefully so that when they bump it exactly the right way it falls into a particular state.

 

So it isn't a closed system, and they admit that it only works with a very small number of items, and then not all the time.

 

I can't see how this violates the second law, let alone 'reverses time'.


Edited by DaveC2042, 14 March 2019 - 07:36 PM.

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#5 ggiles

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Posted 15 March 2019 - 07:37 AM

I agree ... always a huge problem when they write these types of articles ... you never get the full story.

Not really clear in that article is that it is a SIMULATION.

Here is an additional article ... there are quite a few of them out there right now ...

 

https://www.scienced...90314092802.htm

 

Just like everything else in modern physics, I expect the math involved for the full understanding is not transferrable to a proper explanation.




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