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Quantum computer is useless
(Fig.1) Just pie-in-the-sky quantum computer's advantage with No experiments.
The 5th, 12th and 6th-last paragraphs of this hyped news (9/11/2025) say
"they demonstrate that quantum computers can “factor group representations"
"This success is a clear example of "quantum advantage," where quantum computers can solve meaningful problems that are intractable for classical machines." ← fake news
"with a potential (= still unrealized ) quantum speedup"
↑ This research paper ( this-6th-last-paragraph, or this-4th-paragraph ) ↓
p.1-abstract-lower (and p.5-Discussion ) says "conjecture (= with No experiment ) that our quantum algorithms lead to superpolynomial speedups."
↑ This research is just "pie-in-the-sky theory" about illusory quantum speed-up without conducting experiments.
Insider Brief, lower-Limitations and challenges of this hyped news (9/11/2025) say
"Researchers used Google's Sycamore-class superconducting quantum processor to realize Floquet topological order, a non-equilibrium phase of matter that cannot exist in static systems (= unreal useless state ).
The team demonstrated signatures including chiral edge modes and anyonic excitations, scaling experiments up to 58 qubits (= still Not a quantum computer ) where classical simulation becomes intractable" ← fake news
"Moreover, while 58 qubits is beyond the reach of brute-force simulation, it is still modest compared with the scales required for practical fault-tolerant computing. The study demonstrates discovery potential but does Not yet offer a path to immediate applications"
↑ still an impractical quantum computer with No error correction (= cannot give right answers nor fault-tolerant ), so fake quantum advantage.
↑ This research paper ( this-1st-paragraph ) ↓
p.3-Fig.2-d and p.3-left-1st-paragraph says
"Compared with the theoretically expected value r = 1 (= right answer ) for
the amplitudes of the revivals, we observe decay due to errors and
decoherence on the (quantum) processor"
↑ So this Google quantum computer (= experiment ) gave only wrong erroneous answers different from the theoretical right answer of r = 1.0.
↑ This-Fig.2-d shows Google's error-prone qubits' results (= blue lines = Experiment ) greatly deviated from the theoretical right answers of r = 1.0 (= gray line ).
So today's quantum supremacy is fake, useless, giving only wrong erroneous answers (= through fantasy parallel-universe qubit operations that are hard for a classical computer using a single real world to emulate ? No ).
Real quantum advantage should give right (= error-corrected ) answers faster than classical computers, which is impossible forever.
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