First Chip-to-Chip Quantum Teleportation

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Discussion Overview

The discussion centers on the recent demonstration of quantum teleportation of information between two programmable chips by researchers at the University of Bristol's Quantum Engineering Technology Labs. Participants explore the implications of this achievement for quantum communications and computing, as well as its comparative significance to previous milestones in the field.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants highlight the achievement as a significant milestone in quantum communications and computing, noting the demonstration of high-quality entanglement links between chips.
  • Others express skepticism about the significance of this achievement, comparing it unfavorably to a two-year-old Chinese accomplishment in quantum teleportation.
  • One participant emphasizes that the value of the technology should be assessed based on its computational usefulness rather than the distance of teleportation.
  • Another participant raises concerns about the practicality of the device, questioning its classification as a quantum computer due to issues with thermal-optical silicon phase shifters and power consumption per qubit.
  • References to prior research and skepticism about ambitious chip integration attempts are provided, suggesting that earlier prototypes faced significant challenges.

Areas of Agreement / Disagreement

Participants do not reach a consensus; there are multiple competing views regarding the significance and practicality of the quantum teleportation demonstration, with some expressing skepticism and others defending its importance.

Contextual Notes

Participants reference previous research and achievements in quantum teleportation, indicating a context of ongoing debate about the feasibility and implications of quantum computing technologies.

Tom.G
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...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
 
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Tom.G said:
...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
 
It's not about the distance, it's about the usefulness for computations.
 
mfb said:
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.
 
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