Hello, list. I occasionally posted here, years ago; lately I've
lurked. Russell, your book is high on my 'to read' list!
On Oct 7, 2005, at 6:04 PM, Stephen Paul King wrote:
> Hi Russell and Friends,
>
> I just ran across the following post and thought that you might
> find it interesting. Any comments?
>
> Onward!
>
> Stephen
>
One comment - the Unruh effect has some strange consequences. There
was a result last year that two observers sharing an entangled states
(e.g. EPR pairs) will disagree on the degree to which they are
entangled, if one observer is in an accelerated frame. This is truly
bizarre. Paper at
http://www.arxiv.org/abs/quant-ph/0410172 . From
the abstract:
"Two observers determine the entanglement between two free bosonic
modes by each detecting one of the modes and observing the
correlations between their measurements. We show that a state which
is maximally entangled in an inertial frame becomes less entangled if
the observers are relatively accelerated. This phenomenon, which is a
consequence of the Unruh effect, shows that entanglement is an
observer-dependent quantity in non-inertial frames."
Bob Hearn
---------------------------------------------
Robert A. Hearn
rah.domain.name.hidden
http://www.swiss.ai.mit.edu/~bob/
Received on Sat Oct 08 2005 - 02:36:42 PDT