First Chip-to-Chip Quantum Teleportation

[Tom.G]

...researchers at the University of Bristol's Quantum Engineering Technology Labs (QET Labs) demonstrate the quantum teleportation of information between two programmable chip for the first time, which they remark is a cornerstone of quantum communications and quantum computing.


Seems they did it with photonics.

Bristol Co-author Dan Llewellyn said: "We were able to demonstrate a high-quality entanglement link across two chips in the lab, where photons on either chip share a single quantum state.

"Each chip was then fully programmed to perform a range of demonstrations which utilize the entanglement.

Abstract at: https://www.nature.com/articles/s41567-019-0727-x

Full preprint article at: https://arxiv.org/ftp/arxiv/papers/1911/1911.07839.pdf

Cheers,
Tom

 

[trurle]

...researchers at the University of Bristol's Quantum Engineering Technology Labs (QET Labs) demonstrate the quantum teleportation of information between two programmable chip for the first time, which they remark is a cornerstone of quantum communications and quantum computing.Seems they did it with photonics.

Bristol Co-author Dan Llewellyn said: "We were able to demonstrate a high-quality entanglement link across two chips in the lab, where photons on either chip share a single quantum state.

"Each chip was then fully programmed to perform a range of demonstrations which utilize the entanglement.

Abstract at: https://www.nature.com/articles/s41567-019-0727-x

Full preprint article at: https://arxiv.org/ftp/arxiv/papers/1911/1911.07839.pdf

Cheers,
Tom

I think this news are not very impressive. Compared to 2-years old Chinese achievement.

https://www.space.com/37506-quantum-teleportation-record-shattered.html

 

[mfb]

It's not about the distance, it's about the usefulness for computations.

 

[trurle]

It's not about the distance, it's about the usefulness for computations.

Well, if contraption is perceived a quantum computer which is dubious. Sorry, i had difficulty trying to understand the purpose of the device. Actually it cannot be a useful computer due to thermal-optical silicon phase shifters as "programmable" elements. It is watts of static power per qubit, and thermal spread would render "computer" inoperative in milliseconds.
I investigated and found this:
https://arxiv.org/pdf/1803.04449.pdf
Seems ambitious chip integration attempt have failed in early 2018, and to make it work the scale was reduced to 4 qubits, same as similar prototype in 2016.
https://arxiv.org/pdf/1610.01812.pdf

By the way, another thread
https://www.physicsforums.com/threads/the-perils-of-quantum-supremacy-and-research.982291/

is showing link to quite skeptical article to similar task.