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Friday, March 23, 2001
Physics Building, Room 204
Note special time.
[Host: Olivier Pfister]
"Quantum Entanglement as a Resource for Communication"
Quantum mechanical objects can exhibit correlations with one another
are fundamentally at odds with the paradigm of classical physics; one
that the objects are "entangled." In the past few years, entanglement
come to be studied not only as a marvel of nature but also as a
resource, particularly as a resource for certain unusual kinds of
communication. This talk reviews three proposed communication schemes
based on entanglement: (i) dense coding, which is the effective doubling
the information-carrying capacity of a quantum particle through prior
entanglement with a particle at the receiving end; (ii) teleportation,
which a quantum state is transferred from one particle to another over a
distance, apparently without traversing the intervening space; and (iii)
the efficient pooling of classical data, in which separated participants
arrive at a conclusion faster because they share entanglement. These
schemes highlight three distinct ways in which entanglement can enhance
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