Re: Is Intel exceptionally unsuccessful as an architecture designer?

On Thu, 19 Sep 2024 14:15:09 +0000, David Brown wrote:

On 19/09/2024 12:59, Terje Mathisen wrote:
>
According to someone on the internet (that ever-reliable source of
information), an n-bit integer takes 2n + 2 fully entangled qubits and
448.n³.log(n) gates.  For 1024-bit RSA, that's 2050 logical qubits and
about 5×10e12 gates.    For the common default size of 2048-bit RSA,
it's 4098 logical qubits and 4.2×10e13 gates.
>
Then you need the quantum error correction in addition.  I am not at all
convinced that I understand the details here or if I am applying them
correctly, but I think that for larger systems you need perhaps 1000
physical qubits per logical qubit.

I am convinced that quantum computers will eventually be good at
some things that regular computers are not and cannot be.
I am not convinced that any current application is one of those.
And for the things that quantum computers may be great at
{Deciphering without keys} they may do more harm than good.