Re: COMP/MISC: Upload subjective time, baby universes, quantum , Moore's law

Anders Sandberg (
Sun, 26 Jan 1997 23:20:55 +0100 (MET)

On Sat, 25 Jan 1997, Eliezer Yudkowsky wrote:

> An FTL Drive? See

I *knew* it! :-)

> > >If two
> > > million branches of reality try to write to the same byte, the result is
> > > an "ugly mess", as the saying goes.
> >
> > But remember that they write to two million branches of memory too...
> I'm talking read-out, not the interim computation.

Yes, you are right. That is the problem in many ways. It is also
dissipative, which is irritating.

> You'd think that
> 2^64 branches of reality would let you evolve 2^64 computations to find
> the best one... but you can only 'read-out', say, a million of the
> best... and if two million of the best try to write to the same
> 'read-out' memory, the result is an ugly mess when two million branches
> of reality undergo state-vector reduction.

The trick in creating quantum algorithms consists of making most branches
interfere each other away, leaving something useful (like Shor's

Anders Sandberg Towards Ascension!
GCS/M/S/O d++ -p+ c++++ !l u+ e++ m++ s+/+ n--- h+/* f+ g+ w++ t+ r+ !y