1. College of Education for the Future, Beijing Normal University at Zhuhai, No.18, Jinfeng Road, Tangjiawan, Zhuhai City, Guangdong Province 519087, People’s Republic of China
2. School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
3. CENTRA, Departamento de Física, Instituto Superior Técnico – IST, Universidade de Lisboa – UL, Avenida Rovisco Pais 1, 1049 Lisboa, Portugal