In this addendum to our paper (2010 New J. Phys. 12 033024), we point out that an elementary consequence of the strong subadditivity inequality allows us to strengthen one of the main conclusions of that paper.
Howard Barnum et al 2012 New J. Phys. 14 129401. doi:10.1088/1367-2630/14/12/129401
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.
This article was originally published in New Journal of Physics, volume 14, in 2012. DOI: 10.1088/1367-2630/14/12/129401