Classical Communication Cost in Distributed Quantum Information Processing---A generalization of Quantum Communication Complexity

Preprint
Publisher Website
Google Scholar
  • 2 December 1999
Abstract
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 2 (\log_2 N) bits of classical communication, as in standard teleportation.

This publication has 0 references indexed in Scilit: