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posted by Fnord666 on Sunday June 21 2020, @07:11PM   Printer-friendly
from the beam-me-up-scotty dept.

Is teleportation possible? Yes, in the quantum world: Quantum teleportation is an important step in improving quantum computing:

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)


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  • (Score: 2) by Mojibake Tengu on Sunday June 21 2020, @08:13PM (7 children)

    by Mojibake Tengu (8598) on Sunday June 21 2020, @08:13PM (#1010773) Journal

    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.

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  • (Score: 1) by fustakrakich on Sunday June 21 2020, @08:53PM (2 children)

    by fustakrakich (6150) on Sunday June 21 2020, @08:53PM (#1010791) Journal

    is it possible to tell the difference when observing both?

    Have we observed one yet?

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    • (Score: 0) by Anonymous Coward on Sunday June 21 2020, @08:58PM (1 child)

      by Anonymous Coward on Sunday June 21 2020, @08:58PM (#1010792)

      Everyone can observe dark energy. Just close your eyes, take some acid and put on Pink Floyd's "Wish You Were Here".

  • (Score: -1, Troll) by Anonymous Coward on Sunday June 21 2020, @09:00PM

    by Anonymous Coward on Sunday June 21 2020, @09:00PM (#1010796)

    "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)

    by maxwell demon (1608) on Monday June 22 2020, @10:48AM (#1011039) Journal

    Is it possible to entangle electron and positron, such as in, for example, common positronium?

    Yes. Well, at least theoretically; I don't know if anyone has ever measured electron-positron entanglement.

    For dark matter, is there also a dark electricity which does not interact with light electricity?

    Not that we know of.

    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?

    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.

    --
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    • (Score: 3, Insightful) by Mojibake Tengu on Monday June 22 2020, @12:15PM (1 child)

      by Mojibake Tengu (8598) on Monday June 22 2020, @12:15PM (#1011051) Journal

      the hole made of electrons will be negatively charged, while the hole made of positrons will be positively charged

      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.

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      • (Score: 2) by maxwell demon on Monday June 22 2020, @05:47PM

        by maxwell demon (1608) on Monday June 22 2020, @05:47PM (#1011180) Journal

        Let's get serious about this. What happens when such two charged black holes, attracting each other viciously, clash together?

        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.