China's semiconductor quantum chip research breakthrough

According to the official website of the Ministry of Science and Technology, the team of academician Guo Guangcan of the China University of Science and Technology has made new progress in the development of semiconductor quantum chips recently. The semiconductor six-quantum dot chips have been innovatively prepared, and the three-qubit logic gates in the semiconductor system have been realized for the first time in the world. Manipulation will be a solid step forward in the development of integrated semiconductor quantum chips for the future. International Physics Physics authoritative journal "Physical Review Application" recently published this result.

The development of fully electronically controlled quantum chips for semiconductors that are compatible with modern semiconductor processes is one of the most important directions for the development of quantum computers. Professor Guo Guoping of the Guo Guangcan team has long devoted himself to the research and development of semiconductor quantum chips. In recent years, he has achieved achievements such as semiconductor single-charge quantum bit universal logic gates and two-charge quantum dot control non-logic gates.

Guo Guoping recently collaborated with Xiao Ming, Li Haiou, and Cao Gang to theoretically calculate and analyze and innovatively designed a T-electrode open six-quantum dot structure with strong coupling between control bits and target bits. At the same time, the coupling between the two target bits is small, which satisfies the requirement of realizing the control of the two control bits to the target bit controlled NOT gate. Using the optimized high-frequency pulse quantum measurement and control circuit, they successfully realized the world's first three-charge quantum-bit logic gate based on the semiconductor quantum dot system, further improving the efficiency of quantum computing and providing scalable and integrated semiconductor quantum chips. Development laid a solid foundation.

Reviewers of the “Applied Physics Review” believe that this work is an important progress in the quantum computation of quantum dots for semiconductors. The detailed and clear demonstration of high-level experimental techniques will arouse the academic community’s high research enthusiasm for the field.


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