Re: The grandfather paradox, redux
On Sunday, March 24, 2019 at 3:48:30 AM UTC-5, Philip Thrift wrote: > > > > cf. https://en.wikipedia.org/wiki/Grandfather_paradox > > > In the usual EPR-type experiment, a particle A is sent westward and > "correlated" particle B is sent eastward. (A could travel 5 miles and B > could travel just 5 feet, for example.) But their detection outputs show > that A and B are "entangled" so that apparently the detection setups at > both ends influences the "final" states of A and B. > > > In another EPR-type experiment, an emitter sends one particle A "skyward" > into space, and simultaneously a twin particle B to a detector nearby. > Depending on what the B detector measures, an unlucky grandfather is killed > or not. The A particle bends around a massive object (its path bent by > general relativity - it could also be more than one massive object involved > in its travel) light years away and returns to Earth 30 years later when > that grandfather's grandchild has set up a detector for A whose measurement > results in the grandfather's death. > > > - pt > > I should add that the difference in the above example from the typical one A-detector <- Source -> B-detector A B is that in the typical example the time of travel A and the time of travel of B are fairly equal (though both very short), but in the above example the time of travel of A is decades, while B stays the same. - pt -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
Re: The grandfather paradox, redux
I always liked Deutsch's version of MWI better. You kill Gramps but not in your own universe.I also liked Trans-Earth's trading or warfare. Maybe trade, and forget the war? We could do trade with other successful human species like worlds where Neanderthals or Boskops hit the bigtime?Alternate Earth's vacations might be fun, dating? -Original Message- From: Philip Thrift To: Everything List Sent: Sun, Mar 24, 2019 4:48 am Subject: The grandfather paradox, redux cf. https://en.wikipedia.org/ wiki/Grandfather_paradox In the usual EPR-type experiment, a particle A is sent westward and "correlated" particle B is sent eastward. (A could travel 5 miles and B could travel just 5 feet, for example.) But their detection outputs show that A and B are "entangled" so that apparently the detection setups at both ends influences the "final" states of A and B. In another EPR-type experiment, an emitter sends one particle A "skyward" into space, and simultaneously a twin particle B to a detector nearby. Depending on what the B detector measures, an unlucky grandfather is killed or not. The A particle bends around a massive object (its path bent by general relativity - it could also be more than one massive object involved in its travel) light years away and returns to Earth 30 years later when that grandfather's grandchild has set up a detector for A whose measurement results in the grandfather's death. - pt -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
The grandfather paradox, redux
cf. https://en.wikipedia.org/wiki/Grandfather_paradox In the usual EPR-type experiment, a particle A is sent westward and "correlated" particle B is sent eastward. (A could travel 5 miles and B could travel just 5 feet, for example.) But their detection outputs show that A and B are "entangled" so that apparently the detection setups at both ends influences the "final" states of A and B. In another EPR-type experiment, an emitter sends one particle A "skyward" into space, and simultaneously a twin particle B to a detector nearby. Depending on what the B detector measures, an unlucky grandfather is killed or not. The A particle bends around a massive object (its path bent by general relativity - it could also be more than one massive object involved in its travel) light years away and returns to Earth 30 years later when that grandfather's grandchild has set up a detector for A whose measurement results in the grandfather's death. - pt -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
