1、Preliminary Study of Advanced Technologies towards 6G Era:QITs 2023Executive SummaryOver the past year,the latest developments in the 6th generation(6G)communication systems research have been reported all over the world.6G is emerging as an important direction for research and development in the fi

2、eld of communications.As one enabling technology for 6G,quantum information technologies(QITs)continue to attract interest from academia and industry due to the expected information processing capabilities beyond their classical counterparts.In the 6G era,the importance of cybersecurity in mobile co

3、mmunications is expected to rise exponentially.Chapter 2 focuses on quantum secure communication aiming at safeguarding critical information by applying quantum mechanisms.The introduction starts with key technologies including quantum key distribution(QKD)and quantum random number generator(QRNG),f

4、ollowed by state-of-the-art standardization activities for quantum key distribution networks(QKDN)all over the world.Regarding the implications for 6G,China Unicom has built a quantum key cloud platform in Xiongan New Area and carried out a wide range of quantum encryption technology research and ap

5、plication demonstrations.Thus,two of the representative application scenarios,namely,quantum encrypted call and quantum public network cluster intercom will also be introduced in this chapter.To satisfy the dramatically increased communication system performance and rich diversity of innovative serv

6、ices expected by 6G,the emerging quantum machine learning(QML)has attracted significant attention due to its information processing paradigm by combining the established benefits of quantum mechanisms and machine learning.Considering quantum-enhanced reinforcement learning has the potential to revol