one small step - /sci/ (#16715391) [Archived: 544 hours ago]

Anonymous
7/4/2025, 1:31:25 AM No.16715391
321210158169
321210158169
md5: 0968241cff47f49f13ef85acfcfdc4a1🔍
https://www.earth.com/news/scientists-achieve-teleportation-between-quantum-computers-for-the-first-time-ever/
(mentioned link)
https://www.nature.com/articles/s41586-024-08404-x
(also related)
https:/scitechdaily.com/quantum-computers-just-reached-the-holy-grail-no-assumptions-no-limits/
(background)
https://phys.org/news/2019-09-kinds-quantum-properties.html
https://phys.org/news/2019-07-scientists-unveil-first-ever-image-quantum.html
https://phys.org/news/2025-03-metasurface-technology-compact-generate-multiphoton.html
https://phys.org/news/2019-07-transistor-like-gate-quantum-qudits.html
https://phys.org/news/2019-05-quantum-graphene-plasmons.html
==================================
(Earth,com article)
"Scientists achieve teleportation between quantum computers for the first time ever"
By Eric Ralls
Earth.com staff writer
-By teleporting a qubit’s identity rather than physically hauling the particle around, engineers sidestep much of that fragility. The receiving end simply reshapes its own qubit to mirror the original and carries on with the calculation.
The latest experiment used a pair of “network” qubits – atoms optimized for sending and receiving optical signals – and a pair of “circuit” qubits dedicated to crunching data.
Teleportation bridged the network qubits first; the entangled link then let the circuit qubits act as though they shared the same chip.
That separation may sound modest, yet even a six-foot gap lets designers slide in upgrades, repairs, or entirely new hardware without cracking open a refrigerated chamber the size of a wardrobe.
The approach also keeps communication overhead low. Quantum gate teleportation needs just one entangled pair and two classical bits to pull off a two-qubit gate across the network.
-Engineers can keep asking for entangled pairs until they get a clean one, wasting no precious quantum information in the meantime. That efficiency could shave years off the timeline for a functional quantum data center.
Replies: >>16715393
Anonymous
7/4/2025, 1:32:12 AM No.16715393
>>16715391 (OP)
>Cont'd
Oxford quantum teleportation experiment
Only after the teleportation link was humming did the wider world learn who pulled it off: a team at Oxford University led by physicist Dougal Main.
“Previous demonstrations of quantum teleportation have focused on transferring quantum states between physically separated systems,” Dougal Main explains. “In our study, we use quantum teleportation to create interactions between these distant systems.”
-The team’s setup entangled two ytterbium ions, fired off the required classical bits, and recreated a spin state on the far side with an 86 percent match.
-That fidelity crossed the threshold for a basic logic gate, so the researchers ran a compact version of Grover’s search algorithm.
-The distributed gate delivered the correct answer 71 percent of the time – respectable for early hardware and, crucially, limited more by local imperfections than by the teleportation itself.
-Tests that prove the link works
The group didn’t stop at one gate. They executed SWAP and iSWAP operations – building blocks for more elaborate circuits – without moving the ions from their respective traps. Each success chipped away at the notion that distance inherently drags down performance.
“By interconnecting the modules using photonic links, our system gains valuable flexibility, allowing modules to be upgraded or swapped out without disrupting the entire architecture,” says Main.
Teleportation over laboratory distances is only a warm-up. In 2020, researchers in the United States teleported qubits more than 27 miles through existing fiber, showing that telecom infrastructure can handle entanglement if losses are managed.
The full study was published in the journal Nature.
Anonymous
7/4/2025, 1:57:40 AM No.16715414
I'll surely be dead before this turns into anything useful
Replies: >>16715440
Anonymous
7/4/2025, 2:37:19 AM No.16715440
>>16715414
since I started following the gains made in 2015, the elapsed timeframe from each inch forward has decreased from years to several months - and this is just experimenters using basic bitch computers and whatever they can afford to get their hands on. The Year of Quantum Conference (idk France somewhere) is still going on, but, at least the articles are somewhat close timewise coming out to the public from inception.
When it starts to get gritty, esp about adaptive encryption, it will all start to get skewed reporting - then I'll just wish I were dead.