Home page
Quantum computer is useless forever
(Fig.1) "Quantum computer controlling robot's movement" is blatant fake news.
The 8th, 9th paragraphs of this hyped news (8/25/2025) say
"The research team,.. of Waseda University, and Fujitsu.... the number of necessary calculations (of robot's movement ) was significantly reduced compared to conventional classical methods (= deliberately-chosen bad classical methods ).
"..This approach facilitates efficient posture control through a hybrid quantum-classical methodology, where forward kinematics is carried out using quantum circuits and inverse kinematics calculations are performed on classical computers." ← A classical computer was necessary, because today's error-prone quantum computer alone is useless.
"The effectiveness of quantum entanglement (= false. useless entanglement does No work ) was confirmed through an experiment conducted on the 64-qubit quantum computer (= useless, far less than millions of qubits required for a practical quantum computer ) and.. Fujitsu quantum simulator (= quantum simulator is just classical computer )"
↑ This research paper ( this-last ) ↓
p.6-last says "The simulations were conducted using both a local PC (= classical computer ) environment and a Fujitsu quantum simulator (= classical computer )"
p.10-2nd-paragraph says
"It was observed that the accuracy of
the proposed method on real quantum computers is lower than in the simulation (= classical simulator ) due to noise-related issues,
which is a known challenge in practical quantum computation."
↑ The present error-prone quantum computer was useless, inferior to a classical computer disguised as "hybrid quantum simulator"
This-introduction-3rd-paragraph says
"we rely on simulators. These are classical supercomputers dedicated to mimicking the behavior of a quantum computer, such as the Fujitsu Quantum Simulator"
Feel free to link to this site.