Hi Bruno, I can't see that superposition of states is any more magical in one universe than, say, multiple roots to an equation, or imaginary numbers. What matters is whether they are true states or not. And truth is not magical.
----- Receiving the following content ----- From: Telmo Menezes Receiver: everything-list Time: 2013-02-01, 03:46:32 Subject: Re: multiverses and quantum computers Hi Bruno, On Thu, Jan 31, 2013 at 4:15 PM, Bruno Marchal <marc...@ulb.ac.be> wrote: On 31 Jan 2013, at 15:15, Roger Clough wrote: Hi Telmo Menezes Perhaps you're right, but to my limited knowledge, a quantum has infinite paths available between points A and B without invoking another universe. Once we are able to use (classical) information obtained in the other quantum paths, like when doing a Fourier transform on some superposition of many computations, like in a quantum computer, what makes them different of other universes? The superposition of many computations itself. Superposition of states on a same universe are a bit hard to swallow. I think people reject the idea of a multiverse because it sounds loony, but my understanding is that making QM consistent with a single universe requires magical thinking. It's the same as saying that consciousness emerges from neural activity. People overlook the magical step because they are more confortable with the resulting model. Bruno So no problem. ----- Receiving the following content ----- From: Telmo Menezes Receiver: everything-list Time: 2013-01-31, 08:13:30 Subject: Re: Re: About the Infinite Repetition of Histories in Space Hi Roger, In the one universe model, where does the extra computational power of quantum computers come from? On Thu, Jan 31, 2013 at 2:09 PM, Roger Clough <rclo...@verizon.net> wrote: Hi Telmo Menezes IMHO more than one universe is unjustified. ----- Receiving the following content ----- From: Telmo Menezes Receiver: everything-list Time: 2013-01-30, 12:10:08 Subject: Re: About the Infinite Repetition of Histories in Space Hi Roger, I find it harder to believe in finite universes. Why the precise number, whatever it is? On Wed, Jan 30, 2013 at 12:46 PM, Roger Clough <rclo...@verizon.net> wrote: Hi Stephen P. King It's easier to believe in salvation through faith or UFOs than infinite universes. ----- Receiving the following content ----- From: Stephen P. King Receiver: everything-list Time: 2013-01-28, 09:20:33 Subject: About the Infinite Repetition of Histories in Space Hi, ? I think this paper might be fodder for a nice discussion! http://arxiv.org/abs/1301.5295 About the Infinite Repetition of Histories in Space Francisco Jos Soler Gil, Manuel Alfonseca (Submitted on 22 Jan 2013 (v1), last revised 23 Jan 2013 (this version, v2)) This paper analyzes two different proposals, one by Ellis and Brundrit, based on classical relativistic cosmology, the other by Garriga and Vilenkin, based on the DH interpretation of quantum mechanics, both of which conclude that, in an infinite universe, planets and living beings must be repeated an infinite number of times. We point to some possible shortcomings in the arguments of these authors. We conclude that the idea of an infinite repetition of histories in space cannot be considered strictly speaking a consequence of current physics and cosmology. Such ideas should be seen rather as examples of {\guillemotleft}ironic science{\guillemotright} in the terminology of John Horgan. -- Onward! Stephen ____________________________________________________________________ DreamMail - The first mail software supporting source tracking www.dreammail.org -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list?hl=en. 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