[ExI] isn't this extropic?

scerir scerir at libero.it
Mon Jul 7 15:55:00 UTC 2008


Since the good old "quantum measurement" is a ritual mystery, 
quantum theorists - among them Y.Aharonov - invented many 
other "measurements" (i.e. "weak", "non-demolition", "negative",
"Zeno", "anti-Zeno", etc.). These "measurements" are simpler -
but not less paradoxical - than the old one.

In the last years few experiments have been performed.
Now (see below) they are trying a "weak" measurement
of a Schrodinger's "cat" (it is not a cat, of course).
The interesting option is to "undo" such a "weak" measurement,
by erasing the quantity of information they have got
from the "weak" measurement.

The interesting point would be: "weak" measurements
of distant entangled states, or "weak" measurements
vs. quantum cryptography.

But the philosophical point might be: what's next,
a "weak" MWI? 

:-)
  
popular (2007)
http://www.science.org.au/nova/newscientist/096ns_002.htm
popular (2008)
http://tinyurl.com/69w8te
hard (2008)
http://arxiv.org/PS_cache/arxiv/pdf/0806/0806.3547v1.pdf




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