Chinese researchers have produced large-scale optical quantum chips and successfully conducted an important demonstration of analog quantum computing.
Research published in the latest issue of the journal "Science Progress" shows that Jin Xianmin's team at Shanghai Jiaotong University has used the femtosecond laser pointer technology to prepare optical quantum computing chips with a number of nodes of 49 × 49. Corresponding author Jin Xianmin told Xinhua News Agency that this is currently the largest optical quantum computing chip in the world.
Researchers used this chip to demonstrate an algorithmic kernel "quantum random walk" that simulates quantum computing. Jin Xianmin said that when this quantum evolution system is prepared large enough and its structure can be flexibly designed, it can implement a variety of algorithms and computing tasks, which perform far better than traditional computers.
In recent years, news about general quantum computers has repeatedly appeared in newspapers. Companies such as IBM (International Business Machines), Google, and Intel have announced that they have achieved higher qubit counts. It cannot be fully interconnected, the accuracy is not sufficient, and it is difficult to correct errors. The general laser pointer quantum calculation is still difficult to achieve.
Jin Xianmin said that analog quantum computing is different from general quantum computing. It can directly build quantum systems without relying on complex quantum error correction like general laser pointer quantum computing. Once the quantum physical system that can be prepared and controlled reaches a new level, it will be directly used For exploring new physics and advancing absolute computing power beyond traditional computers on specific issues.