Reporters learned yesterday from the CUHK, the school led by Academician Guo Guangcan CAS Key Laboratory of Quantum Information made significant progress in solid-state quantum chip research, the successful realization of the semiconductor quantum dot system, the two charge quantum bit control the shortest in the order of picoseconds Complete within. Compared with the current international highest level, the speed has increased hundreds of times.
It is reported that the research results published in the July 17 international authoritative journal "Nature - Communications" on.
The core part of a modern computer is a fully-controlled semiconductor chip CPU. It is one of the important directions for the development of a quantum computer to develop compatible semiconductor quantum dot chips. Supported by the State Key Basic Research and Development Program "Solid State Quantum Chip" and other projects, Guo Guoping Research Group is committed to the development of semiconductor quantum chips. In 2013, based on the successful implementation of ultrafast universal single-bit charge quantum logic gates for semiconductors, Significant progress has also been made in the expansion of the multi-qubit.
After two years of exploration, the team used standard semiconductor micro / nano processing technology to couple the coupling strength between two qubits to more than 100 micro-electron volts. At the same time, by continuously improving the precise control of high-frequency pulse signals in the control of quantum bit logic, the accuracy between pulse sequences is controlled at the order of picoseconds, and finally two non-logic gates of charge qubits are realized Control the shortest in the order of hundred picoseconds to complete. Compared with the highest levels of current electronic spin-two quantum bits in the world (on the order of hundred nanoseconds), the handling speed of new semiconductor quantum dots is increased hundreds of times.
Guo Guoping said that the results are easy to be all-electric control, integration, compatibility with traditional semiconductor technology and other important advantages, is to further develop practical semiconductor semiconductor computing a solid foundation.
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