1. Department of Algebra and Number Theory Eötvös University Pázmány Péter Sétány 1/c H‐1117 Budapest Hungary
2. Alfréd Rényi Institute of Mathematics Hungarian Academy of Sciences Reáltanoda utca 13‐15 H‐1053 Budapest Hungary
3. Centre for Quantum Software and Information Faculty of Engineering and Information Technology University of Technology Sydney Sydney NSW 2007 Australia