We show that it is possible to achieve maximally entangled mixed states of two qubits from the singlet state via the action of local non-trace-preserving quantum channels. Moreover, we present a simple, feasible linear optical implementation of one of such channels.
@article{arxiv.quant-ph/0603182,
title = {Maximally entangled mixed states made easy},
author = {A. Aiello and G. Puentes and D. Voigt and J. P. Woerdman},
journal= {arXiv preprint arXiv:quant-ph/0603182},
year = {2007}
}