Qubit-qunit decomposition of quantum channel
Quantum Physics
2008-07-02 v1
Abstract
Problem of classification of parallel quantum channels for information transfer is studied by method of ladder operators. Detailed compared to http://arxiv.org/abs/quant-ph/0702076 presentation of method of ladder operators is given. Examples of paired channel and qubit-qunit pair are added. Relations between eigenvalues of density matrices of composite channel and its subchannels determining presence/absence of entanglement of arbitrary mixed state of channel are obtained.
Cite
@article{arxiv.0807.0036,
title = {Qubit-qunit decomposition of quantum channel},
author = {Constantin V. Usenko},
journal= {arXiv preprint arXiv:0807.0036},
year = {2008}
}
Comments
27 pages