The Open Problems in Quantum Information page that was started by Reinhard Werner at TU Braunschweig and then moved to U Hannover (here the [https://web.archive.org/web/20220517102152/https://qig.itp.uni-hannover.de/qiproblems/Main_Page last recorded version (May 2022)] in the Internet Archive) is now maintained [https://oqp.iqoqi.oeaw.ac.at/ here] by a team at [https://www.iqoqi-vienna.at/ IQOQI Vienna].
= Suggested further problems =
We, the administrators of the Hannover open problem pages, will periodically check these contributions and move the ones we find most interesting to the main list.
Please leave your contact information so we can add it as in the list above.
Below is a very short sample problem with the main sections.
== Maximal rate function for estimation ==
=== Problem ===
Show that there is no state estimation procedure whose large deviation rate function is equal to the relative entropy.
=== Background ===
It is known from hypothesis testing that the relative entropy is an upper bound to the rate function.
=== Literature ===
* M. Keyl, Quantum state estimation and large deviations, {{Arxiv|number=quant-ph/0412053}}
[[Category:Resources for the QIP Community]]
