Relations for classical communication capacity and entanglement capability of two-qubit operations

Details Relations for classical communication capacity and entanglement capability of two-qubit operations Relations for classical communication capacity and entanglement capability of two-qubit operations

2002-05-29

arxiv.org/abs/quant-ph/0205181v2

Phys. Rev. A. 67, 040302(R) (2003)

Physics

Quantum Physics

4 pages

Scientific paper

10.1103/PhysRevA.67.040302

Bipartite operations underpin both classical communication and entanglement generation. Using a superposition of classical messages, we show that the capacity of a two-qubit operation for error-free entanglement-assisted bidirectional classical communication can not exceed twice the entanglement capability. In addition we show that any bipartite two-qubit operation can increase the communication that may be performed using an ensemble by twice the entanglement capability.

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