ANOTHER QUANTUM COMPUTER ADVANTAGE FROM GOOGLE?
- waclaw_koscielniak
- 3 minutes ago
- 1 min read
No, not again. Google is claiming another advantage of its quantum computer, Willow.
There is a straightforward test, I came up with, to determine if a quantum computer is functional. People at Google can run this; it's an almost trivial algorithm.
1) X=0, initialize a qubit, gate, or the whole quantum computer to whatever state you like. Hero, zero means an initial state.
2) Determine X, figure out what that state is.
3) Repeat steps 1) and 2) a large number of times, say 1000-10000.
4) Plot the distribution of X.
5) If the distribution is wide, the computer is not functional.
6) Any laptop, desktop, or supercomputer can produce an extremely narrow distribution, but a quantum computer cannot. There are very fundamental reasons why this is happening this way, and there is no way around it. A quantum device cannot be placed in the same quantum state in a reproducible manner. Yes, you can quote me on that.
