While human teleportation exists only in science fiction, teleportation is possible in the subatomic world of quantum mechanics -- albeit not in the way typically depicted on TV. In the quantum world, teleportation involves the transportation of information, rather than the transportation of matter.
Last year scientists confirmed that information could be passed between photons on computer chips even when the photons were not physically linked.
Now, according to new research from the University of Rochester and Purdue University, teleportation may also be possible between electrons.
In a paper published in Nature Communications and one to appear in Physical Review X, the researchers, including John Nichol, an assistant professor of physics at Rochester, and Andrew Jordan, a professor of physics at Rochester, explore new ways of creating quantum-mechanical interactions between distant electrons. The research is an important step in improving quantum computing, which, in turn, has the potential to revolutionize technology, medicine, and science by providing faster and more efficient processors and sensors.
[...] "We provide evidence for 'entanglement swapping,' in which we create entanglement between two electrons even though the particles never interact, and 'quantum gate teleportation,' a potentially useful technique for quantum computing using teleportation," Nichol says. "Our work shows that this can be done even without photons."
The results pave the way for future research on quantum teleportation involving spin states of all matter, not just photons, and provide more evidence for the surprisingly useful capabilities of individual electrons in qubit semiconductors.
Journal References:
Haifeng Qiao, Yadav P. Kandel, Sreenath K. Manikandan, et al. Conditional teleportation of quantum-dot spin states [open], Nature Communications (DOI: 10.1038/s41467-020-16745-0)
Qiao, Haifeng, Kandel, Yadav P., Deng, Kuangyin, et al. Coherent multi-spin exchange in a quantum-dot spin chain, (DOI: https://arxiv.org/abs/2001.02277)
(Score: 0) by Anonymous Coward on Sunday June 21 2020, @07:19PM (1 child)
Electron microscope. Electron "jumps" across barrier to show up on the other side.
(Score: 3, Funny) by driverless on Monday June 22 2020, @02:19AM
It's possible in the real world as well, the USPTO has issued numerous patents for it, e.g. Full Body Teleportation System [google.com], "A pulsed gravitational wave wormhole generator system that teleports a human being through hyperspace from one location to another".
(Score: -1, Flamebait) by Anonymous Coward on Sunday June 21 2020, @07:29PM
Every time a black person breathes on you, SARS-CoV-2 teleports directly into your body whether you wear a face covering or not.
(Score: 1) by fustakrakich on Sunday June 21 2020, @07:33PM (3 children)
Send the signal 13 billion years out, or even just to the moon and back, and let us know the the ping times.
La politica e i criminali sono la stessa cosa..
(Score: 0) by Anonymous Coward on Sunday June 21 2020, @10:15PM (2 children)
Communication above light speed is still not possible.
They should be careful with the word 'information'. You can't send useful information. You can instantly verify that there is a correlation between the two entangled particles (the verification can't happen FTL) but you can't communicate FTL. How one particle correlates to the other isn't necessarily something that can be used to send information from one particle to the other. There are ways that you can show a non-local correlation without being able to effect communicable changes.
(Score: 0) by Anonymous Coward on Sunday June 21 2020, @10:19PM
err ... so you can (at the speed of light) verify that there is an instant correlation ... sorry for mistyping it.
(Score: 3, Funny) by driverless on Monday June 22 2020, @02:28AM
It is if you know about the shortcut. There's a loose board in the fence by Steve's place, the one with the big elm tree outside, if you nip through there it's quicker.
(Score: 2) by Mojibake Tengu on Sunday June 21 2020, @08:13PM (7 children)
Is it possible to entangle electron and positron, such as in, for example, common positronium?
Context: https://en.wikipedia.org/wiki/Positronium#Natural_occurrence [wikipedia.org]
For dark matter, is there also a dark electricity which does not interact with light electricity?
Electron has mass weight, positron too. If you make two black holes, one from hoarding pure electrons, another from hoarding pure positrons, is it possible to tell the difference when observing both?
The Abyss hungrily waits for your answers.
The edge of 太玄 cannot be defined, for it is beyond every aspect of design
(Score: 1) by fustakrakich on Sunday June 21 2020, @08:53PM (2 children)
Have we observed one yet?
La politica e i criminali sono la stessa cosa..
(Score: 0) by Anonymous Coward on Sunday June 21 2020, @08:58PM (1 child)
Everyone can observe dark energy. Just close your eyes, take some acid and put on Pink Floyd's "Wish You Were Here".
(Score: 1) by fustakrakich on Sunday June 21 2020, @09:05PM
Ummagumma is much better
La politica e i criminali sono la stessa cosa..
(Score: -1, Troll) by Anonymous Coward on Sunday June 21 2020, @09:00PM
"Dark matter"... you have to stop using this racist language. The preferred term is now BIPOC matter.
(Score: 4, Informative) by maxwell demon on Monday June 22 2020, @10:48AM (2 children)
Yes. Well, at least theoretically; I don't know if anyone has ever measured electron-positron entanglement.
Not that we know of.
Well, the hole made of electrons will be negatively charged, while the hole made of positrons will be positively charged. But if you were to make a black hole out of neutrinos or antineutrinos, at least from General Relativity there should be no way to tell the difference. But then, General relativity doesn't know about quantum effects, so before we have a successful theory of quantum gravity, we can't tell for sure.
The Tao of math: The numbers you can count are not the real numbers.
(Score: 3, Insightful) by Mojibake Tengu on Monday June 22 2020, @12:15PM (1 child)
Let's get serious about this. What happens when such two charged black holes, attracting each other viciously, clash together?
This phenomenon can also be created with micro black holes, I believe.
And yes, I have a weaponization of this effect on my mind.
The edge of 太玄 cannot be defined, for it is beyond every aspect of design
(Score: 2) by maxwell demon on Monday June 22 2020, @05:47PM
Pretty much the same as with two uncharged black holes: They merge to give a larger black hole (and their charges add up, which for opposite charges of equal absolute value means the charges cancel each other out). The main difference is that besides gravitational waves they will also emit electromagnetic waves (because, after all, they are accelerated electrically charged objects).
For the micro black holes, I guess the hawking radiation will be charged, so that the hole doesn't just lose mass, but also charge (I don't really know much about Hawking radiation, but I expect it just from energy considerations; a particle of opposite charge needs more energy to get away from the charged black hole as it gets electrically attracted). Of course that only applies once the temperature of the black hole is large enough to create electrons/positrons as part of the Hawking radiation.
The Tao of math: The numbers you can count are not the real numbers.
(Score: 2) by Rupert Pupnick on Sunday June 21 2020, @10:43PM (2 children)
Of course there is.
So what makes this quantum teleportation story different from all the many other quantum teleportation stories before it?
(Score: 0) by Anonymous Coward on Sunday June 21 2020, @11:17PM
It's weekend. Fnord is manning the deck.
Let it pass.
(Score: 5, Insightful) by maxwell demon on Monday June 22 2020, @06:52AM
Physicist here.
There's nothing new in terms of fundamental understanding of entanglement here. We now can do it in yet another system. Basically, we have another tool in our quantum technology toolbox.
Also, I wish journalists would stop speaking about Star Trek transporters when talking about quantum teleportation. Maybe we should send this old XKCD link [xkcd.com] to all science reporters.
The Tao of math: The numbers you can count are not the real numbers.
(Score: 2) by chewbacon on Monday June 22 2020, @02:02AM
It's possible, impossible, and could be both!
(Score: 0) by Anonymous Coward on Monday June 22 2020, @05:02PM
in a three phase poly system there are 3 phases (duh) and a neutral.
the voltage across one phase and the neutral is, say, 230 volts and between two phases it's 380 volts.
somewhere in the system the neutrals comeing from a single phase load combine ("sternpunkt").
the question then: where is the point then exacetly down to the atom, where moving the voltmeter tip makes the display jump from 230 to 380 volts?
does it depend on the load; does this "atomic point" move with the load?
can it be used to create a analog quantum computer on the cheap?