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Deterministic quantum teleportation through fiber channels

91 点作者 lainon超过 6 年前

8 条评论

abdullahkhalids超过 6 年前
In this work, continuous-variable quantum states are being teleported. The reason they almost-incorrectly call it deterministic is that continuous-variable [1](think analog) quantum states even when degraded by signal transmission errors will always transmit some information to the destination. Qubit (or discrete state) teleportation on the other hand will usually have some probabilistic errors that completely destroy the signal.<p>Therefore, the correct metric to report for analog signals is the fidelity. They do report this as 69% - which is above a certain important threshold - but also fairly low for any practical application in the near future.<p>[1] as opposed to discrete-variable states eg. qubits
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dsr_超过 6 年前
The number one problem with quantum teleportation is the name. It should have been named quantum telegraphy. There would be fewer cranks.
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lisper超过 6 年前
For anyone wanting a layman&#x27;s description of QT:<p><a href="https:&#x2F;&#x2F;blog.rongarret.info&#x2F;2014&#x2F;12&#x2F;quantum-teleportation-demystified.html" rel="nofollow">https:&#x2F;&#x2F;blog.rongarret.info&#x2F;2014&#x2F;12&#x2F;quantum-teleportation-de...</a>
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thomastjeffery超过 6 年前
Papers like this are so terse.<p>I understand the need to use correct verbiage; but to the layman, this is incomprehensible.
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rightbyte超过 6 年前
Do I get this straight: &quot;Quantum teleportation&quot; is like receiving a letter with four pages and then telling another receiver of the same letter which page to read?
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modzu超过 6 年前
it begins
jcwilde超过 6 年前
Is this not the holy grail?
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copperx超过 6 年前
It&#x27;s not surprising that the article is in English even though it&#x27;s an all-Chinese team, because it was published on an English journal. But I can&#x27;t stop wondering how many years are left before most scientific output is in Chinese. The dominance of English might be over soon.
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