JSCh
ELITE MEMBER
- Joined
- Jun 9, 2011
- Messages
- 13,235
- Reaction score
- 2
- Country
- Location
China Focus: Chinese scientists achieve quantum computational advantage9月8日 11:14 来自 iPhone客户端 已编辑看到各家媒体报道中“已实现100万倍谷歌优越性”的说法，我们既感动，又怀有深重的担忧。感动是，和墨子沙龙一样，做科学科普、关注前沿技术动态的媒体越来越多；忧虑的是，部分报道有失准确。据我们了解，潘建伟院士在西湖大学公开课演讲上的表述为：“近期已经完成50个光子的高斯玻色采样，按照现在的初步估计和数据分析，应该能够比Google的量子优越性大概快100万倍。当然，这需要进一步分析，现在不能百分之百保证。”“在超导量子计算方面，目前正在开展60个超导比特的量子相干控制，如果做成，在性能方面大概可以比Google快3个数量级左右。”“这些是目前正在开展的一些工作。”科学研究是一件富有前瞻、充满激情的事情，同时更需要严谨扎实的论证、厚积薄发的沉淀。努力所至，梦想方会来临！
Translation:
Mozi Salon of Shanghai Research Institute of University of Science and Technology of China
At 11:14 on September 8
Seeing the statement in various media reports that "one million times the better than Google has been achieved", we are both moved and deeply worried. What is touching is that, like the Mozi Salon, more and more media are doing scientific popularization and paying attention to cutting-edge technology trends; what is worrying is that some reports are not accurate.
As far as we know, the statement made by Academician Pan Jianwei in the open lecture of West Lake University is:
"The Boson sampling of 50 photons has been completed recently. According to current preliminary estimates and data analysis, it should be about 1 million times faster than Google's quantum superiority. Of course, this requires further analysis and cannot be guaranteed at this time."
"In terms of superconducting quantum computing, the quantum coherent control of 60 superconducting bits is currently on-going. If it is successfully made, it will probably be about 3 orders of magnitude faster than Google in terms of performance."
"These are some of the work currently being carried out."
Scientific research is a forward-looking and passionate thing. At the same time, it requires rigorous and solid argumentation and accumulated accumulation. If you work hard, your dream will come!
@中科院之声 @ Intellectuals @University of Science and Technology of China
O global benchmark! Academician Pan Jianwei announced that it has achieved 1 million times Google...
Source: Xinhua| 2020-12-04 04:25:23|Editor: huaxia
HEFEI, Dec. 4 (Xinhua) -- A research team including renowned Chinese quantum physicist Pan Jianwei announced Friday a significant computing breakthrough, achieving quantum computational advantage.
The team established a quantum computer prototype, named "Jiuzhang," via which up to 76 photons were detected. The study was published in Science magazine online.
This achievement marks that China has reached the first milestone on the path to full-scale quantum computing -- a quantum computational advantage, also known as "quantum supremacy," which indicates an overwhelming quantum computational speedup.
No traditional computer can perform the same task in a reasonable amount of time, and the speedup is unlikely to be overturned by classical algorithmic or hardware improvements, according to the team.
In the study, Gaussian boson sampling (GBS), a classical simulation algorithm, was used to provide a highly efficient way of demonstrating quantum computational speedup in solving some well-defined tasks.
The average detected photon number by the prototype is 43, while up to 76 output photon-clicks were observed.
Jiuzhang's quantum computing system can implement large-scale GBS 100 trillion times faster than the world's fastest existing supercomputer.
The team also said the new prototype processes 10 billion times faster than the 53-qubit quantum computer developed by Google.
"Quantum computational advantage is like a threshold," said Lu Chaoyang, professor of the University of Science and Technology of China. "It means that, when a new quantum computer prototype's capacity surpasses that of the strongest traditional computer in handling a particular task, it proves that it will possibly make breakthroughs in multiple other areas."
The breakthrough is the result of 20 years of effort by Pan's team, which conquered several major technological stumbling blocks, including a high-quality photon source.
"For example, it is easy for us to have one sip of water each time, but it is difficult to drink just a water molecule each time," Pan said. "A high-quality photon source needs to 'release' just one photon each time, and each photon needs to be exactly the same, which is quite a challenge."
Compared with conventional computers, Jiuzhang is currently just a "champion in one single area," but its super-computing capacity has application potential in areas such as graph theory, machine learning and quantum chemistry, according to the team.
