On the '5D' claim: "The information encoding inside the disc is realised in five dimensions - the size and orientation of the nanostructures, in additional to their three-dimensional positions inside the disc." Those nanostructures are generated by a laser which alters the polarization of the material.
Is that even five dimensional? Polarization is one more, but can each point in space contribute to an arbitrary (or even just large) number of different polarization? I do not see where the fifth might come from.
The billion year claim does not seem to be validated, unlike similar research which used tungsten and silicon carbide[1], i.e. two different materials. The million/billion year durability was verified by substituting long periods of time with higher temperatures, i.e. heating the storage medium, and then checking the error rate.
Is that even five dimensional? Polarization is one more, but can each point in space contribute to an arbitrary (or even just large) number of different polarization? I do not see where the fifth might come from.
The billion year claim does not seem to be validated, unlike similar research which used tungsten and silicon carbide[1], i.e. two different materials. The million/billion year durability was verified by substituting long periods of time with higher temperatures, i.e. heating the storage medium, and then checking the error rate.
[1]: https://doc.utwente.nl/74827/1/Vries2010MME.pdf / https://www.utwente.nl/en/news/!/2013/10/141415/a-mega-to-gi... (not peer reviewed?)