Scientists just teleported an object into Earth's orbit for the first time (2017) • Hacker News Board

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#11

Post by jrootabega » Sat, Dec 12, 2020, 12:57 PM UTC

SuperCuber wrote: post #4

Can someone ELI5 why this doesn't break the "information can't move faster than the speed of light" rule?

The article is essentially nonsense. Entanglement cannot transmit arbitrary information. At best, it can provide remote synchronization. E.g. my photon collapsed to a 0, therefore I know my partner's photon is a 1. We will execute Playbook A.

Also, nothing teleported. The photon in question was sent via a laser.

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#12

Post by jrgd » Sat, Dec 12, 2020, 12:59 PM UTC

NiceWayToDoIT wrote: post #10

jrgd wrote: post #6

Earlier quoted context omitted.

it feels like the core advantage over current information transportation is for inter planetary communication.

I still do not understand, as they do not carry Qubits, but they use laser to transmit information, why not use the laser in the first place to transmit information?

couldn’t find a reference to laser in the article; where did you read this?

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#13

Post by wheybags » Sat, Dec 12, 2020, 1:00 PM UTC

rwoerz wrote: post #9

Would that work with an object of the size and mass of, say, a mother in law? Just curious...

https://m.youtube.com/watch?v=EEyUeCyXl1Q

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#14

Post by jrgd » Sat, Dec 12, 2020, 1:01 PM UTC

hadrien01 wrote: post #8

(2017)

old click bait and i fell for it! thanks

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#15

Post by lisper » Sat, Dec 12, 2020, 1:02 PM UTC

SuperCuber wrote: post #4

Can someone ELI5 why this doesn't break the "information can't move faster than the speed of light" rule?

Because the quantum teleportation protocol requires the transmission of classical information in order to complete it. It's really a bogus label. Nothing physical is being teleported. It's just a way of using two classical bits to move a qbit from A to B.

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#16

Post by monadic3 » Sat, Dec 12, 2020, 1:03 PM UTC

jrgd wrote: post #6

NiceWayToDoIT wrote: post #3

Can someone please explain how is quantum teleportation different than, transmitting information about object and then making another object behave the same way as the first one?

it feels like the core advantage over current information transportation is for inter planetary communication.

The only benefit that quantum entanglement provides is the agreement of a key over a distance. Communication itself would be "normal", i.e. EM.

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#17

Post by lisper » Sat, Dec 12, 2020, 1:03 PM UTC

NiceWayToDoIT wrote: post #3

Can someone please explain how is quantum teleportation different than, transmitting information about object and then making another object behave the same way as the first one?

That is exactly what it is. The only reason it's a thing at all is that the state being moved is a quantum state and quantum states can't be copied.

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#18

Post by monadic3 » Sat, Dec 12, 2020, 1:04 PM UTC

NiceWayToDoIT wrote: post #3

Can someone please explain how is quantum teleportation different than, transmitting information about object and then making another object behave the same way as the first one?

A better way to look at it is that a key is agreed upon, but not known, when the particles are entangled. When it collapses, you can read the key. The information, the key itself, still travels bounded by light speed from the point of entanglement. You cannot "write" over the entangled particles so this does not provide instantaneous communication.

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#19

Post by masteranza » Sat, Dec 12, 2020, 1:07 PM UTC

jrootabega wrote: post #11

SuperCuber wrote: post #4

Can someone ELI5 why this doesn't break the "information can't move faster than the speed of light" rule?

The article is essentially nonsense. Entanglement cannot transmit arbitrary information. At best, it can provide remote synchronization. E.g. my photon collapsed to a 0, therefore I know my partner's photon is a 1. We will execute Playbook A. Also, nothing teleported. The photon in question was sent via a laser.

Exactly. ELI5 is that quantum teleportation is (sadly) a marketing phrase. It is 2020 and such phrases as "teleported an object" are simply a mischief.

Re: Scientists just teleported an object into Earth's orbit for the first time (2017)

#20

Post by psychoslave » Sat, Dec 12, 2020, 1:08 PM UTC

SuperCuber wrote: post #4

Can someone ELI5 why this doesn't break the "information can't move faster than the speed of light" rule?

Information is the result of an interpretation, not the data you try to share with a distant interpreter.

As current widely admitted interpretation of red shift tell us, there are star moving away from us at a pace faster than speed of light, due to time-space inflation.

And finally, one possible interpretation of quantic intrication is that the change reflected on two distant objects is that there are actually the same object on some dimension which we can't grab with our tools.

None of these invalidate the idea of a maximum speed for all objects along a given dimension of a stable space.