http://xxx.lanl.gov/abs/quant-ph/0009055
Gisin, Scarani, Tittel and Zbinden
in this *very beautiful* article say that....
The story of quantum nonlocality is fascinating. We
could take advantage of this to promote Physics! We
already learned a lot from it, in particular about the
weirdness and importance of entanglement in the quantum
world. We are also learning how important entanglement
can be for our technology, namely that we could
exploit entanglement to perform tasks classically
impossible, like quantum cryptography and many others.
This field is nowaday well recognized under the general name
of quantum information processing. But the story
is not at the end. Using new technologies, revolutionary
assumptions can be tested. Admittedly, some of the
assumptions discussed in this contribution are wild. But
they are testable with today's technology and they
provide great intellectual excitement. Moreover, they are
very natural in the context of the debate about the
existence or non-existence of state-vector collapses,
a question which triggered animated discussions and disputes
since the very early times of quantum mechanics, 100
years ago. It is worth realizing that there are not that
many alternatives to the existence of "real collapses":
without collapses the logical implication of the
superposition principle is that all possibilities co-exist,
in the form of some multiverse. But this huge superposition
can't be tested directly. Isn't it nice to argue
in favor or against the concept of collapse as a physical
phenomena by designing and performing experiments of the kind
discussed in this contribution!
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