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"In the post-selected universe the proof appears from nowhere."
This is very good news i.e. retrocausal signal nonlocality.
I have argued for years that this is precisely how creative consciousness works in general!
Presponse is how all new ideas in our minds come into being - a bootstrapped precognitive remote viewing triggered by events in the environment.
However, there will be no paradoxes for the reason Igor Novikov gave. (Google Books "River of Time")
"In this comment on S.Lloyd, et al, Phys.Rev.Lett. 106, 040403 (2011), we show that modelling closed timelike curves (CTCs) as post-selected teleportation allows signalling to past times before the creation of the CTC and allows information paradoxes to form. ...

In their interesting recent letter Lloyd et al [1] propose
post-selected teleportation as an alternative model for
quantum systems interacting with closed timelike curves
(CTCs) - paths through spacetime, apparently allowed
by general relativity, that allow objects to interact with
their own past - contrasting it with the more accepted
model due to Deutsch [2]. The authors suggest that their
post-selected model (P-CTC) is able to avoid certain
paradoxes associated with time travel whilst retaining
all correlations of the interacting quantum system with
other quantum systems. Ref [2] does not allow quantum
correlations with other systems to be retained in general.
Here we show by example that when entanglement is con-
sidered, P-CTCs: (i) allow signalling to past times before
the creation of the closed timelike curve; and (ii) allow
an unresolved unproven theorem" paradox to form in
this epoch."

"By choosing to introduce a phase flip on his qubit
or not, Bob can deterministically send a string of bits (in
the diagonal basis) to Alice in the past. The existence
of this adio to the past" creates the possibility of new
paradoxes, now in the classical domain. In particular the
unproved theorem paradox [2] can arise. Bob reads the
proof of a theorem in a book and uses the set-up of Fig.1
(top panel) to send it back in time to Alice. Alice sub-
sequently publishes it in the book from which Bob will
read it. Where did the proof come from?"

The particular state transition in the paper is well known to allow

signal nonlocality, i.e. use of entanglement as a stand-alone

Command-Control-Communication channel not needing a classical signal key to unlock it.


On Jul 31, 2011, at 10:56 AM, art wagner wrote:

http://lanl.arxiv.org/PS_cache/arxiv/pdf/1107/1107.4675v1.pdf

Category: MyBlog

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