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Quantum internet is useless
(Fig.1) Sending information (= teleportation is just classical communication ) between just 2 qubits separated by 2m caused high error rate of 30%. ← far from a practical quantum computer or internet
The recent Oxford's alleged quantum supercomputer's teleportation closer to large-scale practical use (2/6/2025) is just an overhyped fake news.
↑ This research used only two trapped ions as two qubits (= each ion's two energy levels are used as one qubit's 0 or 1 state, so just 2 bitstring 00 = Not a computer. this p.1-abstract-middle~lower ), which falls far short of millions of qubits required for a practical quantum computer ( this 4th-paragraph ).
They just sent bit information between these (just) 2 ion qubits separated by only 2 meter via ordinary classical communication channel (= called teleportation that is irrelevant to quantum mechanical communication ) with extremely bad error rate of 30% in each qubit operation (= fidelity or success rate is only 70%, this-p.1-abstract, p.4-left, this-9th~11th-paragraphs ).
This 12th-paragraph says
"In this case, having only two qubits (= just 2 bitstring 01, still Not a computer ), the list maxed out at four items. Still, it worked, again with a fidelity of about 70 percent (= just manipulating 2 bitstring 01 caused high error rate of 30%, useless )."
So this Oxford research's just 2 error-prone impractical qubits (= 00, 01, 11.. = still Not a computer, this-3rd-paragraph ) are far from the practical scalable quantum supercomputer (= Not a quantum supercomputer at all ) mentioned by overhyped fake news.
They also did Grover algorithm which just manipulated only 2 qubits to 00, 01, 10. or 11 with high error rate 30%, which also has No practical use.
This-last-paragraph says
"Scaling up quantum computers (from 2 qubits) remains a formidable technical challenge."
Governments and corporations should stop wasting money on these overhyped hopeless quantum computers, quantum internet, teleportation, and allocate the money to developing practical multi-probe atomic force microscopes manipulating atoms.
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