Researchers achieve sustained, high-fidelity quantum teleportation

Phys.org ^ | December 29, 2020 | University of Chicago

[BenLurkin]

Quantum teleportation is a "disembodied" transfer of quantum states from one location to another. The quantum teleportation of a qubit is achieved using quantum entanglement, in which two or more particles are inextricably linked to each other. If an entangled pair of particles is shared between two separate locations, no matter the distance between them, the encoded information is teleported.

In a paper published in PRX Quantum, the team presents for the first time a demonstration of a sustained, long-distance teleportation of qubits made of photons (particles of light) with fidelity greater than 90%.

The qubits were teleported over a fiber-optic network 27 miles (44 kilometers) long using state-of-the-art single-photon detectors, as well as off-the-shelf equipment.

The joint team—researchers at Fermilab, AT&T, Caltech, Harvard University, NASA Jet Propulsion Laboratory and University of Calgary—successfully teleported qubits on two systems: the Caltech Quantum Network and the Fermilab Quantum Network. The systems were designed, built, commissioned and deployed by Caltech's public-private research program on Intelligent Quantum Networks and Technologies, or IN-Q-NET.

Both the Caltech and Fermilab networks, which feature near-autonomous data processing, are compatible both with existing telecommunication infrastructure and with emerging quantum processing and storage devices. Researchers are using them to improve the fidelity and rate of entanglement distribution, with an emphasis on complex quantum communication protocols and fundamental science.

[BenLurkin]

"Teleported" over fiber-optic cable?

[dp0622]

It’s very hard to understand it all but it’s quite incredible.

I was under the assumption that this was happened naturally too.

Very wrong? :)

Folks think of Star Trek when they hear teleportation but I thought it was the creation of a replica on the other side.

Ah, it’s hurting my head again :)

I’ll leave it for the smarter folks.

[Harmless Teddy Bear]

Can they teleport me to a world where logic runs the show?

[Mr. N. Wolfe]

I miss Art Bell.

[Reno89519]

Okay, the article is very weak on details. How fast from point A to B? How much energy required? High fidelity meaning that the data can varied to communicate data of some type? Is this scalable? What is the application?

[Bob434]

finally- Well, teleport me back to the 70’s/80’s please- lotsa things i wanna do over again- get right-

[mythenjoseph]

The word disembodied and then moved over fibre optic line some 29 something miles to another location infers that the qbit was physically moved via breaking it down to a form of light......thats what I got out of the brief article. Also says they are going to upgrade which implies it got moved but may not have ended up as it started?...maybe didn’t reconstruct exact on the other end?

[ProtectOurFreedom]

Can we be teleported out of this impending communist take-over into a free world?

[KTM rider]

to a world with no masks and science fiction isn’t taken seriously

[noiseman]

Quantum teleportation is not transporting matter from one point to another, but rather instantaneously duplicating the quantum state of an atom in another atom that already exists somewhere else. In that way, it can be used to instantaneously transmit information, theoretically over any distance, by using the quantum state of atoms to encode the information. A side benefit is that any message sent this way is impossible to intercept, because any attempt by an outside party to observe the information instantly destroys it.

Those are the basics as I understand it, but don’t ask me the details of how it’s possible. I don’t think even the researchers working on it really understand what is happening when it occurs.

[dp0622]

I read the full article (I don’t do that often!) and you sound correct in your assumptions.

It would be great if they used it in an example.

We have incredible speeds for sending information as it is.

How much faster is needed and what’s the upside?

I know this whole quantum computer thing will make it capable for a single code to be a 0 or a 1, and I don’t know how that works and what it means either :)

I know how codes are built. I just don’t understand how 0 and 1 could occupy the same space in the code.

[Pez149]

In other words,
Your gonna have to buy a new phone.....

[eyedigress]

It hasn’t been 0 or 1 since the 70’s.

Even 360 modulation is out. Think 5G

[dp0622]

OK I’m out of this conversation on that note :)

It just went from confusing to don’t bother for me :)

[dp0622]

Regular computers are based on “bits” – imagine them as little switches pointing to either a 1 or a 0.

Quantum computing relies on quantum bits, or “qubits”, which can also represent a 0 or a 1. The crazy thing is, qubits can also achieve a mixed state, called a “superposition” where they are both 1 and 0 at the same time. This ambiguity – the ability to both “be” and “not be” – is key to the power of quantum computing.

So here it seems like 0 and 1 are still used.

It’s from this article.

https://cosmosmagazine.com/physics/quantum-computing-for-the-qubit-curious/

I thought 0s and 1s were still at the most basic level of programming still.

[rfp1234]

That will make deporting illeg@l @liens useless. They’ll just beam them back across the border.

[MadMax, the Grinning Reaper]

Physics dictionary, PLEASE!!! I don’t speak Quark, Ferengi, or Transporter room jive.

[eyedigress]

Dude....

It is the most basic but now they have levels.

[DannyTN]

Bookmarked for myself from the other side.

[eyedigress]

They are using QPSK which is 360 (Quadrature Phase Shift Keying). An extra carrier has been introduced to carry extra information at a faster rate. It is still FM. This is day one.