Non–commutativity in Teleportation
نویسندگان
چکیده
We show, using the no–disentanglement theorem, that to teleport (exactly) any set of non–commuting states (i.e., a set containing at least two non–commuting states), it is necessary to have an entangled channel. We further show that to teleport any set of commuting states it is sufficient to have a classically correlated channel. Using this result we provide a simple proof of the fact that any set of bipartite entangled states can be exactly disentangled if the single particle density matrices of any one party commute. The idea of quantum teleportation is to send an unknown state to a distant party without actually sending the particle itself. A protocol for this scheme was proposed by Bennett et. al. [1], where an entangled channel is required between the two parties. In this letter we discuss the necessity [email protected] [email protected] [email protected]
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