%0 Journal Article
%T Classical Communication Cost in Distributed Quantum Information Processing - A generalization of Quantum Communication Complexity
%A Hoi-Kwong Lo
%J Physics
%D 1999
%I arXiv
%R 10.1103/PhysRevA.62.012313
%X We study the amount of classical communication needed for distributed quantum information processing. In particular, we introduce the concept of "remote preparation" of a quantum state. Given an ensemble of states, Alice's task is to help Bob in a distant laboratory to prepare a state of her choice. We find several examples of an ensemble with an entropy S where the remote preparation can be done with a communication cost lower than the amount (2S) required by standard teleportation. We conjecture that, for an arbitrary N-dimensional pure state, its remote preparation requires 2log_2 N bits of classical communication, as in standard teleportation.
%U http://arxiv.org/abs/quant-ph/9912009v2