A General Fidelity Limit for Quantum Channels
量子物理
2016-09-08 v1
摘要
We derive a general limit on the fidelity of a quantum channel conveying an ensemble of pure states. Unlike previous results, this limit applies to arbitrary coding and decoding schemes, including nonunitary decoding. This establishes the converse of the quantum noiseless coding theorem for all such schemes.
引用
@article{arxiv.quant-ph/9603014,
title = {A General Fidelity Limit for Quantum Channels},
author = {Howard Barnum and Christopher A. Fuchs and Richard Jozsa and Benjamin Schumacher},
journal= {arXiv preprint arXiv:quant-ph/9603014},
year = {2016}
}
备注
14 pages, RevTeX. Submittted to Physical Review A