A quantum web page
نویسنده
چکیده
In quantum teleportation, an unknown quantum state is transmitted from one party to another using only local operations and classical communication, at the cost of shared entanglement. Is possible similarly, using an N party entangled state, to have the state retrievable by any of the N − 1 possible receivers? If the receivers cooperate, and share a suitable state, this can be done reliably. The N party GHZ is one such state; I derive a large class of such states, and show that they are in general not equivalent to the GHZ. I also briefly discuss the problem where the parties do not cooperate, and the relationship of this problem to the problem of multipartite entanglement quantification.
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