The Chinese Academy of Sciences reveals the coherence phenomenon and regulation mechanism of perovskite quantum dots

Perovskite quantum dots, as an emerging semiconductor nanocrystal material, are gradually becoming a brilliant new star in the field of quantum information technology due to their excellent light absorption and emission properties, as well as unique spin orbit coupling.

Recently, the exciting news came from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences. The researcher Wu Kaifeng and the associate researcher Zhu Jingyi team of the institute have made important progress in the field of quantum information technology research, and published a review article on quantum coherence and dynamic optical regulation in colloidal perovskite quantum dots in Nature Materials. This review delves into the quantum coherence phenomena and dynamic optical control mechanisms in colloidal perovskite quantum dots, providing a comprehensive perspective and in-depth insights for research in fields such as quantum light sources and spin qubit carriers.

The Wu Kaifeng team has long been deeply involved in the field of ultrafast spectroscopy and dynamics of colloidal quantum dots. By developing circularly polarized femtosecond transient magneto-optical technology, they have successfully achieved ultrafast coherent manipulation of hole spin in perovskite quantum dots at room temperature. This achievement not only breaks through the limitations of traditional quantum dot technology, but also opens up new paths for research in cutting-edge fields such as quantum computing and quantum communication.

In addition, the team also observed exciton spin coherent beat frequencies at the ensemble level, revealing a new mechanism for exciton fine structure splitting, and achieved precise control of these fine structures and coherent dynamics through magnetic fields, demonstrating the enormous potential of perovskite quantum dots in quantum manipulation.

The review article systematically summarizes the significant advantages of perovskite quantum dots in the field of quantum light sources, including high purity, high stability, and good coherence. These characteristics make perovskite quantum dots an indispensable key material in future quantum information technology. At the same time, the article also deeply analyzes the unique collective coherence behavior of transition dipoles in quantum dots, as well as the spin coherence dynamics and manipulation strategies of excitons and charge carriers, providing valuable theoretical support and practical guidance for the practical application of quantum information technology.

Looking ahead to the future, Wu Kaifeng's team not only pointed out the challenges currently faced by perovskite quantum dots in quantum information technology applications, such as the stability, manipulation accuracy, and scalability of quantum states, but also proposed a series of potential solutions and technical routes, providing researchers with clear research directions and ideas.

The publication of this review article not only marks that the research strength of the Chinese Academy of Sciences Dalian Institute of Chemical Physics in the field of quantum information technology has been widely recognized by the international academic community, but also injects new impetus into the vigorous development of global quantum information technology. With the continuous deepening of research and breakthroughs in technology, it is believed that perovskite quantum dots will show broader application prospects in various fields of quantum information technology!

Reference source: China Science Journal