Coherent Communication of Classical Messages
Author:
- 5 March 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 92 (9) , 097902
Abstract
We define coherent communication in terms of a simple primitive, show it is equivalent to the ability to send a classical message with a unitary or isometric operation, and use it to relate other resources in quantum information theory. Using coherent communication, we are able to generalize superdense coding to prepare arbitrary quantum states instead of only classical messages. We also derive single-letter formulas for the classical and quantum capacities of a bipartite unitary gate assisted by an arbitrary fixed amount of entanglement per use.Keywords
All Related Versions
This publication has 10 references indexed in Scilit:
- Relation between classical communication capacity and entanglement capability for two-qubit unitary operationsPhysical Review A, 2003
- On the capacities of bipartite hamiltonians and unitary gatesIEEE Transactions on Information Theory, 2003
- Teleportation as a quantum computationPhysica D: Nonlinear Phenomena, 1998
- The capacity of the quantum channel with general signal statesIEEE Transactions on Information Theory, 1998
- Sending classical information via noisy quantum channelsPhysical Review A, 1997
- Capacity of the noisy quantum channelPhysical Review A, 1997
- Concentrating partial entanglement by local operationsPhysical Review A, 1996
- Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channelsPhysical Review Letters, 1993
- Communication via one- and two-particle operators on Einstein-Podolsky-Rosen statesPhysical Review Letters, 1992
- Neumark's theorem and quantum inseparabilityFoundations of Physics, 1990