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Scientists simulate backward time travel using quantum entanglement

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Re: Scientists simulate backward time travel using quantum entanglement

#61

Post by atlantic »

omnicognate wrote: post #49
trulyunruly wrote: post #47

Earlier quoted context omitted.

Cunningham's Law:) I was only hoping to provide some direction. But thank you for finding the right answer.

I found and posted the answer in parallel with you, and then deleted my direct response when I replied to yours (at greater length as I initially posted only the link, which was sufficient for merely answering the question). I don't think the posting of unverified ChatGPT snippets in response to factual questions on HN has value.

So in effect, several possible responses were sent from the past, but the irrelevant ones were deleted, leaving only the right answer. Hmmm.

Re: Scientists simulate backward time travel using quantum entanglement

#62

Post by gerad »

xwdv wrote: post #60
gerad wrote: post #48

Earlier quoted context omitted.

I read it as: - Today, I need to predict tomorrow’s weather. - Yesterday I made some measurements of the (temperature, pressure, etc) conditions that I need for today’s prediction. - Yesterday it was impossible to know what measurements I’d optimally need to take for today’s forecast. - Today, I can (quantumly, probabilisticly) go back in time and make sure I have the optimal set of measurements for today’s predictio…

If you already know the optimal set of measurements why not skip the whole traveling back in time part and just change tomorrow today?

> The problem is that, only after the interaction does the metrologist learn which input would have been optimal.

Re: Scientists simulate backward time travel using quantum entanglement

#64

Post by paulrouget »

omnicognate wrote: post #44
trulyunruly wrote: post #41

Earlier quoted context omitted.

”The book you're remembering is likely "Mr. Tompkins" by George Gamow. The series features the character Mr. Tompkins, but in "Mr. Tompkins in Paperback" (which combines "Mr. Tompkins in Wonderland" and "Mr. Tompkins Explores the Atom"), he has a daughter named Gedanken. The stories are known for their accessible exploration of advanced scientific concepts, including those related to Einstein's theories, through fant…

AFAICT there is no character named "Gedanken" in that book. The correct book was findable in a few seconds with a traditional search engine: The Time and Space of Uncle Albert by Russell Stannard [1]. [1] https://books.google.co.uk/books/about/The_Time_and_Space_of...

Incredible book.

In french it's Les Trous Noirs Et L'Oncle Albert.

I read that book when I was ~14 years old. I can't overstate how incredible that book was. Having a grasp of what special relativity was at that age really made me feel like I could learn anything just by reading the right books. I never stopped reading about astrophysics since then. And I'm now 40+.

Re: Scientists simulate backward time travel using quantum entanglement

#65

Post by LeFever »

omnicognate wrote: post #56
guyomes wrote: post #51

Earlier quoted context omitted.

You have great search engine skills! Out of curiosity, what was the exact input you used, and on which search engine? I tried "adventure book girl named gedanken and grandfather on einstein theory" on Google and didn't get the right answer.

I had to refine it twice, IIRC, ending up with something like 'einstein book story girl "gedanken"' (the second refinement being by clicking next to one of the links that didn't include "gedanken"), for which one of the results was a New Scientist review of the book. I did it on Google because I was on iPhone Safari, which doesn't have a good way to use Kagi by default, but I strongly prefer Kagi where possible.

I know we’re really getting into the weeds here, but I’m curious what issues you’re having with iOS Safari and Kagi. I’m using it with both normal and private tabs and it’s working great. There were a series of fixes in the past month to the Kagi app (necessary for Safari integration) that specifically addressed issues with private browsing. Might want to try it again. Good luck!

Re: Scientists simulate backward time travel using quantum entanglement

#66

Post by omnicognate »

LeFever wrote: post #65
omnicognate wrote: post #56

Earlier quoted context omitted.

I had to refine it twice, IIRC, ending up with something like 'einstein book story girl "gedanken"' (the second refinement being by clicking next to one of the links that didn't include "gedanken"), for which one of the results was a New Scientist review of the book. I did it on Google because I was on iPhone Safari, which doesn't have a good way to use Kagi by default, but I strongly prefer Kagi where possible.

I know we’re really getting into the weeds here, but I’m curious what issues you’re having with iOS Safari and Kagi. I’m using it with both normal and private tabs and it’s working great. There were a series of fixes in the past month to the Kagi app (necessary for Safari integration) that specifically addressed issues with private browsing. Might want to try it again. Good luck!

I just dislike the idea of installing an app or extension just to change the default search engine. Not Kagi's fault, entirely Apple's.

Re: Scientists simulate backward time travel using quantum entanglement

#67

Post by LeFever »

omnicognate wrote: post #66
LeFever wrote: post #65

Earlier quoted context omitted.

I know we’re really getting into the weeds here, but I’m curious what issues you’re having with iOS Safari and Kagi. I’m using it with both normal and private tabs and it’s working great. There were a series of fixes in the past month to the Kagi app (necessary for Safari integration) that specifically addressed issues with private browsing. Might want to try it again. Good luck!

I just dislike the idea of installing an app or extension just to change the default search engine. Not Kagi's fault, entirely Apple's.

Definitely agree. Ideally you’d be able to extend the search engine list in Safari’s settings but alas.

Re: Scientists simulate backward time travel using quantum entanglement

#68

Post by forgotusername6 »

omnicognate wrote: post #44
trulyunruly wrote: post #41

Earlier quoted context omitted.

”The book you're remembering is likely "Mr. Tompkins" by George Gamow. The series features the character Mr. Tompkins, but in "Mr. Tompkins in Paperback" (which combines "Mr. Tompkins in Wonderland" and "Mr. Tompkins Explores the Atom"), he has a daughter named Gedanken. The stories are known for their accessible exploration of advanced scientific concepts, including those related to Einstein's theories, through fant…

AFAICT there is no character named "Gedanken" in that book. The correct book was findable in a few seconds with a traditional search engine: The Time and Space of Uncle Albert by Russell Stannard [1]. [1] https://books.google.co.uk/books/about/The_Time_and_Space_of...

Thanks for finding it! I guess my traditional search engine skills aren't that great these days. Searching either returned booked on Einstein or German titles.

Re: Scientists simulate backward time travel using quantum entanglement

#69

Post by elcritch »

pmontra wrote: post #27
elcritch wrote: post #20

Earlier quoted context omitted.

I'm reading (well listening to) a sci-fi novel based on that premise called "Quantum Radio". Pretty classic techno-thriller, complete with shadowy organizations. I really enjoyed the premise and setup of CERN data being used as a quantum radio reading messages from the future, or perhaps parallel universes.

This one? [1] Beware, it's a review so there are possible spoilers. [1] https://sfbook.com/quantum-radio.htm

Yep, that’s it.

Re: Scientists simulate backward time travel using quantum entanglement

#70

Post by galaxyLogic »

corney91 wrote: post #46
dr_kiszonka wrote: post #32

Earlier quoted context omitted.

A less charitable interpretation would be that is a form of self-aggrandizement.

It's a pretty standard word used in quantum physics. Source: I did a masters in the subject and remember reading it a lot.

There is something to it. If you say it is a "thought experiment" the interpretation is "of it's juts your thoughts right?" When you say "Gedanken ... " it means this is part of real research in physics (since E did it this way)
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