Optimal partial estimation of quantum states from several copies
Quantum Physics
2009-11-13 v1
Abstract
We derive analytical formula for the optimal trade-off between the mean estimation fidelity and the mean fidelity of the qubit state after a partial measurement on N identically prepared qubits. We also conjecture analytical expression for the optimal fidelity trade-off in case of a partial measurement on N identical copies of a d-level system.
Cite
@article{arxiv.quant-ph/0606112,
title = {Optimal partial estimation of quantum states from several copies},
author = {Ladislav Mista and Jaromir Fiurasek},
journal= {arXiv preprint arXiv:quant-ph/0606112},
year = {2009}
}
Comments
5 pages, 2 figures, RevTeX4