@article {rapcan_recycling_2010,
title = {Recycling of qubits},
journal = {Physica Scripta},
volume = {T140},
year = {2010},
pages = {014059},
abstract = {We consider a finite number, N, of qubits that encode a pure single qubit state SU(2) covariantly. Given the N-qubit state has already been measured optimally to estimate the single-qubit state, we analyse the maximum information obtainable by a second, and subsequent observers ignorant of important details of the previous measurements. We quantify the information acquired by each observer as a function of N and of the number of independent observers that in succession have independently measured the same ensemble of qubits before him.},
issn = {0031-8949},
doi = {10.1088/0031-8949/2010/T140/014059},
url = {http://iopscience.iop.org/1402-4896/2010/T140/014059?fromSearchPage=true},
author = {P Rapcan and Calsamiglia, John and Mu{\~n}oz-Tapia, Ramon and Bagan, Emilio and V Buzek}
}