On 4/24/2015 4:24 AM, LizR wrote:
On 24 April 2015 at 23:03, spudboy100 via Everything List
<[email protected] <mailto:[email protected]>> wrote:
How about this? MWI, if true, refutes the no-clonning conundrum.
Yes, that's my opinion too - but it doesn't allow US to do it. The MWI is constantly
duplicating quantum states, indeed there are infinite numbers of copies of the entire
universe's quantum state waiting to differentiate.
In Everett's MWI the mulitple "worlds" are just projections of the one
state-of-the-multivers onto different (approximately) orthogonal subspaces. There's no
duplicating of states. And in any case the no-cloning theorem doesn't prohibit there
being multiple copies of a state, it just prevents you from measuring an unknown state
completely so that you know you have duplicated it. You can make copies of a state you
know (i.e. prepare). And you could coincidentally make a copy of an unknown state - you
just wouldn't be able to know it was a copy.
Brent
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