Chinese Scientists Make Breakthrough in Quantum Computing

[cirr]

Happy Cinco de Mayo!




Now I am just curious how our Indian friends here are going to spin this news with their usual "copy & paste" rhetoric.

More detailed report in Chinese

世界首台光量子计算机在中国诞生

2017-05-03 10:30:59

关键字:光量子计算机诞生中国量子计算机

【观察者网TMT报道】五一假期刚过，科技界就迎来一个重磅消息：世界上第一台超越早期经典计算机的光量子计算机诞生！中国科学院5月3日在上海举行新闻发布会发布了这一消息。

这次一共发布了两个量子计算机的原型，一种基于超导，一种基于光学。其中，10比特超导量子线路样品，演示了求解线性方程组的量子算法，相关成果即将发表于国际权威期刊《物理评论快报》。

中科院研制的光量子计算机线路图 中国科学院阿里巴巴量子计算实验室供图

针对多光子“玻色取样”任务的光量子计算原型机，是历史上第一台超越早期经典计算机量子模拟机，比国际同行类似的实验加快至少24000倍，5月2日，该研究成果以长文的形式在线发表于《自然光子学》。

更令人振奋的是，这个“世界首台”是货真价实的“中国造”，属中国科学技术大学潘建伟教授及其同事陆朝阳、朱晓波等，联合浙江大学王浩华教授研究组攻关突破的成果。

什么是量子计算机？曾有人打过一个比方：如果现在传统计算机的速度是自行车，量子计算机的速度就好比飞机。使用亿亿次的“天河二号”超级计算机求解一个亿亿亿变量的方程组，所需时间为100年。而使用一台万亿次的量子计算机求解同一个方程组，仅需0.01秒。

中国科学院阿里巴巴量子计算实验室 资料图

多粒子纠缠的操纵作为量子计算的技术制高点，一直是国际角逐的焦点。在光子体系，潘建伟团队在国际上率先实现了五光子、六光子、八光子和十光子纠缠，一直保持着国际领先水平。在超导体系，2015年，谷歌、美国航天航空局和加州大学圣芭芭拉分校宣布实现了9个超导量子比特的高精度操纵。这个记录在2017年被中国科学家团队打破。

根据今天发布会上的消息，潘建伟、朱晓波、王浩华等自主研发了10比特超导量子线路样品，通过发展全局纠缠操作，成功实现了目前世界上最大数目的超导量子比特的纠缠和完整的测量。进一步，研究团队利用超导量子线路演示了求解线性方程组的量子算法，证明了通过量子计算的并行性加速求解线性方程组的可行性。相关成果即将发表于国际权威期刊《物理评论快报》。

在光量子计算方面，潘建伟、陆朝阳等利用自主发展的综合性能国际最优的量子点单光子源，并通过电控可编程的光量子线路，构建了针对多光子“玻色取样”任务的光量子计算原型机。实验测试表明，该原型机的取样速度不仅比国际同行类似的实验加快至少24000倍，同时，通过和经典算法比较，也比人类历史上第一台电子管计算机（ENIAC）和第一台晶体管计算机（TRADIC）运行速度快10-100倍。

中科院微博截图

以前，量子计算速度比经典计算机快还只是停留在理论中，而该台原型机将这一理论变成现实迈出了坚实的第一步，把量子计算机真正推向和经典计算机竞争的擂台。这是历史上第一台超越早期经典计算机量子模拟机，为最终实现超越经典计算能力的量子计算这一国际学术界称之为“量子称霸”的目标奠定了坚实的基础。

在超导体系，该研究团队自主研发了10比特超导量子线路样品，通过高精度脉冲控制和全局纠缠操作，成功实现了目前世界上最大数目的超导量子比特的多体纯纠缠，并通过层析测量方法完整地刻画了10比特量子态。这一成果打破了美国之前保持的9个量子比特操纵的记录，形成了一个完整的超导计算机的系统，使我国在超导体系量子计算机研究领域也进入世界一流水平行列。

根据计划，潘建伟研究团队将计划在今年年底实现大约 20 个光量子比特的操纵， 20 个超导量子比特样品的设计、制备和测试，量子计算机的速度将会成指数增长。

量子计算机是指利用量子相干叠加原理，理论上具有超快的并行计算和模拟能力的计算机。随着可操纵的粒子数的增加，量子计算机的计算能力呈指数增长，可以为经典计算机无法解决的大规模计算难题提供有效解决方案，具有巨大的发展潜力。一台操纵 50个微观粒子的量子计算机，对一些特定问题的处理能力甚至比超级计算机更强。如果现在经典计算机的速度是自行车，那量子计算机的速度就好比飞机。并行计算让量子计算机一秒钟就可完成超级计算机几年的计算任务，几天内就能解决传统计算机花费数百万年时间才能处理的问题。正是因为其广阔的发展前景，许多欧美发达国家以及大型高科技公司纷纷布局相关研究。

目前，发展这一技术的关键在于如何通过发展高精度、高效率的量子态制备与相互作用控制技术，实现规模化量子比特的相干操纵。国际上学术界对于量子计算技术的研究主要基于光子、超冷原子和超导线路三个体系上。我国科学家日前在光子和超导线路上取得的重大突破，对于量子计算机的研究与应用具有标志性意义。

http://www.guancha.cn/TMT/2017_05_03_406444.shtml

Three technical routes: single photons, ultra-cold atoms and superconducting circuits.

Two prototypes, based on single photons and superconducting circuits, respectively, are unveiled this time.

Chinese scientists make quantum leap in computing

Source: Xinhua | 2017-05-03 14:21:06

Chinese leading quantum physicist Pan Jianwei (2nd R), an academician of the Chinese Academy of Sciences and his colleagues announce their achievements at a press conference in Shanghai, east China, May 3, 2017. Chinese scientists have built world's first quantum computing machine that goes beyond the early classical -- or conventional -- computers, paving the way to the ultimate realization of quantum computing beating classical computers. (Xinhua/Jin Liwang)

SHANGHAI, May 3 (Xinhua) -- Chinese scientists have built the world's first quantum computing machine that goes far beyond the early classical -- or conventional -- computers, paving the way to the ultimate realization of quantum computing.

Scientists announced their achievement at a press conference in the Shanghai Institute for Advanced Studies of University of Science and Technology of China on Wednesday.

Scientists believe quantum computing could in some ways dwarf the processing power of today's supercomputers. One analogy to explain the concept of quantum computing is that it is like being able to read all the books in a library at the same time, whereas conventional computing is like having to read them one after another.

Pan Jianwei, an academician of the Chinese Academy of Sciences and a leading quantum physicist, said quantum computing exploits the fundamental quantum superposition principle to enable ultra-fast parallel calculation and simulation capabilities.

In normal silicon computer chips, data is rendered in one of two states: 0 or 1. However, in quantum computers, data could exist in both states simultaneously, holding exponentially more information.

The computing power of a quantum computer grows exponentially with the number of quantum bits that can be manipulated. This could effectively solve large-scale computation problems that are beyond the ability of current classical computers, Pan said.

For example, a quantum computer with 50 quantum bits would be more powerful in solving quantum sampling problems than today's fastest supercomputer, Sunway TaihuLight, installed in the National Supercomputing Center of China.

Due to the enormous potential of quantum computing, Europe and the United States are actively collaborating in their research. High-tech companies, such as Google, Microsoft and IBM, also have massive interests in quantum computing research.

The research team led by Pan is exploring three technical routes: systems based on single photons, ultra-cold atoms and superconducting circuits.

Recently, Pan Jianwei and his colleagues -- Lu Chaoyang and Zhu Xiaobo, of the University of Science and Technology of China, and Wang Haohua, of Zhejiang University -- set two international records in quantum control of the maximal numbers of entangled photonic quantum bits and entangled superconducting quantum bits.

Pan explained that manipulation of multi-particle entanglement is the core of quantum computing technology and has been the focus of international competition in quantum computing research.

In the photonic system, his team has achieved the first 5, 6, 8 and 10 entangled photons in the world and is at the forefront of global developments.

Pan said quantum computers could, in principle, solve certain problems faster than classical computers. Despite substantial progress in the past two decades, building quantum machines that can actually outperform classical computers in some specific tasks -- an important milestone termed "quantum supremacy" -- remains challenging.

In the quest for quantum supremacy, Boson sampling, an intermediate (that is, non-universal) quantum computer model, has received considerable attention, as it requires fewer physical resources than building universal optical quantum computers, Pan said.

Last year, Pan and Lu Chaoyang developed the world's best single photon source based on semiconductor quantum dots. Now, they are using the high-performance single photon source and electronically programmable photonic circuit to build a multi-photon quantum computing prototype to run the Boson sampling task.

The test results show the sampling rate of this prototype is at least 24,000 times faster than international counterparts, according to Pan's team.

At the same time, the prototype quantum computing machine is 10 to 100 times faster than the first electronic computer, ENIAC, and the first transistor computer, TRADIC, in running the classical algorithm, Pan said.

It is the first quantum computing machine based on single photons that goes beyond the early classical computer, and ultimately paves the way to a quantum computer that can beat classical computers. This achievement was published online in the latest issue of Nature Photonics this week.

In the superconducting quantum circuit system, a research team from Google, NASA and the University of California at Santa Barbara announced a high-precision manipulation of 9 superconducting quantum bits in 2015.

Now the Chinese team led by Pan, Zhu Xiaobo and Wang Haohua have broken that record. They independently developed a superconducting quantum circuit containing 10 superconducting quantum bits and successfully entangled the 10 quantum bits through a global quantum operation.

Chinese scientists aim to realize manipulation of 20 entangled photons by the end of this year, and will try to design and manipulate 20 superconducting quantum bits. They also plan to launch a quantum cloud computing platform by the end of this year.

Chinese leading quantum physicist Pan Jianwei, an academician of the Chinese Academy of Sciences, announces the achievements at a press conference in Shanghai, east China, May 3, 2017. Chinese scientists have built world's first quantum computing machine that goes beyond the early classical -- or conventional -- computers, paving the way to the ultimate realization of quantum computing beating classical computers. (Xinhua/Jin Liwang)

http://news.xinhuanet.com/english/2017-05/03/c_136253686.htm

 

[Bussard Ramjet]

This is not a real quantum computer yet, but the success of Pan Jianwei and his team clearly demonstrates the pathway to build a real quantum computer that with more photons in control (thus higher computation speed).

Pan's quantum machine now can beat the early classical computers (e.g. ENIAC or TRADIC). Some one may laugh at this. But please keep in mind, the first step is always the most challenging step. We all know how the computation power grows after the first electronic computer ENIAC invented in 1940s'. We are very lucky, because we can watch a similar wave be replicated in the area of quantum computer.

Below is the conclusion part of Pan's publication on this breakthrough.

Conclusion and outlook
Owing to our development of the high-efficiency source of highly indistinguishable single photons and ultra-low-loss photonic circuits, the experiment demonstrated 3-boson sampling rate of 4.96 KHz is ~27,000 times faster than the best previous experiments using SPDC, and ~24,000 times faster than the recent work using passive demultiplexing (thus intrinsically inefficient) of quantum-dot single photons using incoherent excitation that limited the photon indistinguishability to 52%-64%. Meanwhile, we achieve the first 4- and 5-boson sampling using single-photon Fock state—which were formidable challenges before—and obtain high sampling rates of 151 Hz and 4 Hz, respectively. These multi-photon boson-sampling machines have also reached a computational complexity that can race against early classical computers. Under the specific racing rule in ref. 5, 9, 10, we could compare the required time for obtaining one output sample using the quantum machines with the simulated time for calculating one permanent using the published data of the early classical computers (see Supplementary Information). As shown in Table SII, the quantum photonic machines are provably faster for the boson-sampling task than ENIAC and TRADIC, the first electronic computer and transistorized computer.


Our work has demonstrated a clear, realistic pathway to build boson-sampling machines with many photons and fast rates. Using superconducting nanowire singlephoton detectors with reported efficiency of ~95% and antireflection optical coating, one can straightforwardly increase the 3-, 4-, and 5-boson sampling rates to 130 KHz, 12 KHz, and 1 KHz, respectively, and implement 14-boson-sampling with a count rate of 5/h (see Supplementary Information). A remaining challenge is to remove the crosspolarization in the confocal setup—used to extinguish the laser background—which reduced the single-photon source efficiency by half. Future work will focus on deterministic dot-micropillar coupling and developing side excitation to boost the single-photon source efficiency to over 74%, in which case we can expect 20-boson sampling rate of ~130/h, and an increasing quantum advantage over classical computation for larger number of photons.

Are you a physicist my friend?

For you are the only one who seems to know in this thread the fact that this machine is NOT a quantum computer per se.

It is a setup which uses quantum principles to perform some very specific computations.

Not what one would typically think of as a computer.

Chinese scientists claim milestone in developing quantum computers

PUBLISHED : Wednesday, 03 May, 2017, 2:39pm
UPDATED : Wednesday, 03 May, 2017, 2:47pm

COMMENTS:

Stephen Chen

4SHARE

PrintEmail


29 Apr 2017
A team of scientists from eastern China has built the first form of quantum computer which they say is faster than one of the early generation of conventional computers developed in the 1940s.

The researchers at the University of Science and Technology of China at Hefei in Anhui province built the machine as part of efforts to develop and highlight the future use of quantum computers.

The devices make use of the way particles interact at a subatomic level to make calculations rather than conventional computers which use electronic gates, switches and binary code.

The Hefei machine predicts the highly complex movement and behaviour of subatomic particles called photons, which make up light.

China in race to build first code-breaking quantum supercomputer

Normal supercomputers struggle to predict the behaviour of photons because of their huge level of unpredictability and the difficulties in modelling.

Pan Jianwei, the lead scientist on the project, told a press briefing in Shanghai on Wednesday that their device was already 10 to 11 times faster at carrying out the calculations than the first electronic digital computer, ENIAC, would have been capable of. ENIAC was developed in the 1940s.

CHINA AT A GLANCE
Get updates direct to your inbox.
E-mail *

By registering you agree to our T&Cs & Privacy Policy

In a few years time, he said, their machine would eclipse all of the world’s supercomputers in carrying out the calculations.

The Chinese team admit that their machine is of no practical use as it only carries out this one highly complex form of calculation, but it highlights the future potential of quantum computing. The team’s research was formally published in the scientific journal Nature Photonics on Tuesday.

Scientists estimate that the current faster supercomputers would struggle to estimate the behaviour of 20 photons.

The Hefei researchers’ quantum device, called a boson sampling machine, can now carry out calculations for five photons, but at a speed 24,000 times faster than previous experiments, they say.

“Our architecture is feasible to be scaled up to a larger number of photons and with a higher rate to race against increasingly advanced classical computers,” they said in the research paper.

Teleportation, the next generation: Chinese and Canadian scientists closer to a quantum internet

Professor Scott Aaronson, who is based at the University of Texas at Austin and proposed the idea of the boson sampling machine, questioned whether it was useful to compare the latest results with technology developed over 60 years ago, but he said the research had shown “exciting experimental progress”.

“It’s a step towards boson sampling with say 30 photons or some number that’s large enough that no one will have to squint or argue about whether a quantum advantage has been attained,” he said.

Araronson said one of the main purposes of making boson sampling machines was to prove that quantum devices could be shown to have an advantage in one area of complex calculations over existing types of computer.

“Doing so would answer the quantum computing sceptics and help pave the way towards universal quantum computation,” he said.

http://www.scmp.com/news/china/poli...scientists-claim-milestone-developing-quantum

Chinese scientists make quantum leap in computing

2017-05-03 10:38

Xinhua Editor: Gu Liping

Chinese scientists have built world's first quantum computing machine that goes beyond the early classical -- or conventional -- computers, paving the way to the ultimate realization of quantum computing beating classical computers.

Scientists announced their achievement at a press conference in the Shanghai Institute for Advanced Studies of University of Science and Technology of China on Wednesday.

Many scientists believe quantum computing could in some ways dwarf the processing power of today's supercomputers. The manipulation of multi-particle entanglement is the core of quantum computing technology and has been the focus of international competition in quantum computing research.

Recently, Chinese leading quantum physicist Pan Jianwei, an academician of the Chinese Academy of Sciences and his colleagues -- Lu Chaoyang and Zhu Xiaobo, of the University of Science and Technology of China, and Wang Haohua, of Zhejiang University -- set two international records in quantum control of the maximal numbers of entangled photonic quantum bits and entangled superconducting quantum bits.

Pan said quantum computers could, in principle, solve certain problems faster than classical computers. Despite substantial progress in the past two decades, building quantum machines that can actually outperform classical computers in some specific tasks -- an important milestone termed "quantum supremacy" -- remains challenging.

In the quest for quantum supremacy, Boson sampling, an intermediate (that is, non-universal) quantum computer model has received considerable attention, as it requires fewer physical resources than building universal optical quantum computers, Pan said.

Last year, Pan and Lu Chaoyang developed the world's best single photon source based on semiconductor quantum dots. Now, they are using the high-performance single photon source and electronically programmable photonic circuit to build a multi-photon quantum computing prototype to run the Boson sampling task.

The test results show the sampling rate of this prototype is at least 24,000 times faster than international counterparts, according to Pan's team.

At the same time, the prototype quantum computing machine is 10 to 100 times faster than the first electronic computer, ENIAC, and the first transistor computer, TRADIC, in running the classical algorithm, Pan said.

It is the first quantum computing machine based on single photons that goes beyond the early classical computer, and ultimately paves the way to a quantum computer that can beat classical computers. This achievement was published online in the latest issue of Nature Photonics this week.

http://www.ecns.cn/2017/05-03/255864.shtml

Please seek out expert opinions on such complex things.

Firstly, this ISN'T a general purpose quantum computer. This is a very specific type of quantum computation. So, it being 24,000 faster is only in terms of being faster from current generation of quantum computations of this type. It is not competing with other kinds of quantum computers being developed elsewhere.

This is a report from Nature, the top most science journal in the world:

Europe’s billion-euro quantum project takes shape


Scientists offer more detail on flagship programme to harness quantum effects in devices.

• Elizabeth Gibney

03 May 2017
Article tools
Rights & Permissions

Ion Quantum Technology Group, Univ. Sussex

Quantum computers are Europe’s next big project.

As China and the United States threaten to corner the market on quantum technologies, Europe is slowly waking up to the opportunity with investment of its own. A year ago, the European Commission announced that it would create a €1-billion (US$1.1-billion) research effort in the field, and it should start to invite grant applications later this year. But scientists coordinating the project say that they are already concerned because industry partners seem reluctant to invest.

Members of an advisory group steering the Quantum Technology Flagship, as the project is called, gave details of how it will work at a meeting on 7 April at the Russian Centre of Science and Culture in London. The project aims to exploit the bizarre behaviour shown by quantum systems to develop new technologies, such as super-secure communication systems and miniature, ultra-accurate sensors.

But the programme is playing catch-up. Many labs in rival regions are already developing quantum technologies, including at large firms such as Google and Microsoft.

Related stories

• Chinese satellite is one giant step for the quantum internet
• Europe plans giant billion-euro quantum technologies project
• Physics: Unite to build a quantum Internet

More related stories

“Europe cannot afford to miss this train,” says Vladimir Buzek, a member of the advisory group and a physicist at the Research Center for Quantum Information of the Slovak Academy of Sciences in Bratislava. “The industry here, to my taste, is really waiting too long,” he said at the meeting.

Launched in April 2016 as part of an apparently unrelated initiative in cloud-computing, the quantum project is the European Commission’s latest decade-long, billion-euro initiative. Yet, the two previous EU mega-projects — the Graphene Flagship and the Human Brain Project, both announced in 2013 — have yet to fully prove their value. The latter has been plagued by disputes over its leadership. And both have had difficulty drumming up complementary investment from member states, says Tommaso Calarco, a physicist at the Centre for Integrated Quantum Science and Technology at the Universities of Ulm and Stuttgart in Germany, and another adviser on the steering committeee.

The Quantum Technology Flagship will work differently, he says. Rather than run largely as a closed consortium selected at the project’s outset, it will operate with open calls throughout. He says that this should ensure high levels of competition, and offer the flexibility to fund the best researchers throughout. And he hopes that it will encourage member states to invest nationally to make stronger bids for funding.

Some European countries show signs of supporting the project. Hungary, Austria and Germany have all announced their own national quantum-technology programmes since the flagship’s launch. The German initiative, called QUTEGA, is currently in a pilot form, but is likely to be worth around €300 million over 10 years. Initial projects include miniaturized magnetic sensors, which pick up tiny electric currents and could be used to monitor the brain during surgery, as well as small, transportable, high-precision atomic clocks, says Gerd Leuchs, a physicist at the Max Planck Institute for the Science of Light, Erlangen, and coordinator of the project.

Product potential
The European flagship will focus on four quantum technologies: communication, computing, sensing and simulation. It will also incorporate basic science. Although Europe produces some of the best research in these fields, other regions file more patents, says Martino Travagnin, who, along with his colleagues at the European Commission’s Joint Research Centre in Ispra, Italy, has analysed patenting in quantum technologies.

China currently dominates in quantum communication, which uses quantum properties of particles to develop shared secret keys for encryption. The country holds the most patents in the field and is already trialling both a quantum-communication satellite and a 2,000-kilometre secure ground-based link. And the United States leads on patents in quantum computing and ultra-sensitive sensors.

Companies are involved with the EU project, Buzek told the meeting, with 12 representatives on the expert group. “But industry seems like it’s just waiting for what the academy is going to produce, and then at some point, it’s willing to take the result,” he said. Although EU companies might lack the cash to dive into quantum technologies, as their US counterparts have done, smaller companies could invest in producing crucial components, he said.

Brexit problems
One problem facing the quantum-flagship scheme is the possible loss of the United Kingdom, one of Europe’s strongest research communities in quantum technology. (Following the Brexit vote, the United Kingdom is scheduled to leave the European Union in 2019, the year in which the first projects kick off.) The United Kingdom is one of the few nations to involve relevant companies in the research, Calarco points out, through its £350-million (US$450-million) UK National Quantum Technologies Programme. He hopes that the United Kingdom will be able to continue in some capacity — either by paying into the European funding pot, as Switzerland does, or through a match-funding model.

The timing of the project should also play in its favour, he notes. A UK government commitment to underwrite funding for existing EU projects means that the early years of investment will be guaranteed. The next round should start sufficiently long enough after the Brexit negotiation for a solution to have emerged. “Given the circumstances, this is the best timing we could imagine,” he says.

https://www.nature.com/news/europe-s-billion-euro-quantum-project-takes-shape-1.21925

But USA just self-proclaimed hours ago that they can win this race?

http://www.nationalreview.com/article/447250/quantum-computing-race-america

@C130

Right now, in quantum computing they are indeed leading and winning the race.

 

[Yaseen1]

u.s all attention is to attack other countries they used moab but afghanistan situation is not changed they are wasting their money like ussr and will face same situation in future.they are declining quickly day by day and their future is dark

 

[Bussard Ramjet]

u.s all attention is to attack other countries they used moab but afghanistan situation is not changed they are wasting their money like ussr and will face same situation in future.they are declining quickly day by day and their future is dark

Can you support your assertions with facts?

How are they declining? Their economy is growing at 2% in real terms, which is pretty fast for a developed economy, the dollar is at an all time high, indicating confidence in the dollar, their population is growing at a decent pace.

Also, the MOAB is peanuts for the country the size of the United States.

 

[kankan326]

Does that mean the first ever quantum computer was born in China?

 

[onebyone]

Chinese scientists make quantum leap in computing
TECH & SCI
By Hu Shaocong

2017-05-03 11:40 GMT+8

1068km to Beijing

Chinese scientists have built the world's first quantum computing machine, paving the way for this technology to outperform classical, or conventional, computers.
Scientists announced their achievement during a press conference in the Shanghai Institute for Advanced Studies of University of Science and Technology of China on Wednesday.
Many scientists believe quantum computing could, in some ways, dwarf the processing power of today's supercomputers. The manipulation of multi-particle entanglement, a phenomenon during which the state of each particle within a larger group cannot be described independently of others even when separated, is the core of quantum computing technology and has been the focus of international competition in quantum computing research.

Chinese scientist Pan Jianwei at the press conference announcing their achievements in quantum computing science. /Renmin Daily Photo
Recently, Chinese leading quantum physicist Pan Jianwei, an academician of the Chinese Academy of Sciences and his colleagues, Lu Chaoyang and Zhu Xiaobo, of the University of Science and Technology of China, and Wang Haohua, of Zhejiang University, set two international records in quantum control of the maximal numbers of entangled photonic quantum bits and entangled superconducting quantum bits.
Pan said quantum computers could, in principle, solve certain problems faster than classical computers. Despite substantial progress in the past two decades, building quantum machines that can actually outperform classical computers in some specific tasks - an important milestone termed "quantum supremacy" - remains challenging.
Last year, Pan and Lu Chaoyang developed the world's best single photon source based on semiconductor quantum dots. Now, they are using the high-performance single photon source and electronically programmable photonic circuit to build a multi-photon quantum computing prototype to run the Boson sampling task.
The test results show the sampling rate of this prototype is at least 24,000 times faster than international counterparts, according to Pan's team.
At the same time, the prototype quantum computing machine is 10 to 100 times faster than the first electronic computer, ENIAC, and the first transistor computer, TRADIC, in running the classical algorithm, Pan said.
It is the first quantum computing machine based on single photons that goes beyond the early classical computer, The achievement was published online in the latest issue of Nature Photonics this week.

https://news.cgtn.com/news/3d41444f78637a4d/share_p.html

 

[Yaseen1]

Can you support your assertions with facts?

How are they declining? Their economy is growing at 2% in real terms, which is pretty fast for a developed economy, the dollar is at an all time high, indicating confidence in the dollar, their population is growing at a decent pace.

Also, the MOAB is peanuts for the country the size of the United States.

these growth figures are for present but in future u.s cannot maintain this because china industrial growth is far more than u.s and also whole world is becoming more dependent on chinese products day
by day and in future china can trade with other countries by using its own currency instead of dollar

 

[maximuswarrior]

Chinese scientists make quantum leap in computing

2017-05-03 10:38

Xinhua Editor: Gu Liping

Chinese scientists have built world's first quantum computing machine that goes beyond the early classical -- or conventional -- computers, paving the way to the ultimate realization of quantum computing beating classical computers.

Scientists announced their achievement at a press conference in the Shanghai Institute for Advanced Studies of University of Science and Technology of China on Wednesday.

Many scientists believe quantum computing could in some ways dwarf the processing power of today's supercomputers. The manipulation of multi-particle entanglement is the core of quantum computing technology and has been the focus of international competition in quantum computing research.

Recently, Chinese leading quantum physicist Pan Jianwei, an academician of the Chinese Academy of Sciences and his colleagues -- Lu Chaoyang and Zhu Xiaobo, of the University of Science and Technology of China, and Wang Haohua, of Zhejiang University -- set two international records in quantum control of the maximal numbers of entangled photonic quantum bits and entangled superconducting quantum bits.

Pan said quantum computers could, in principle, solve certain problems faster than classical computers. Despite substantial progress in the past two decades, building quantum machines that can actually outperform classical computers in some specific tasks -- an important milestone termed "quantum supremacy" -- remains challenging.

In the quest for quantum supremacy, Boson sampling, an intermediate (that is, non-universal) quantum computer model has received considerable attention, as it requires fewer physical resources than building universal optical quantum computers, Pan said.

Last year, Pan and Lu Chaoyang developed the world's best single photon source based on semiconductor quantum dots. Now, they are using the high-performance single photon source and electronically programmable photonic circuit to build a multi-photon quantum computing prototype to run the Boson sampling task.

The test results show the sampling rate of this prototype is at least 24,000 times faster than international counterparts, according to Pan's team.

At the same time, the prototype quantum computing machine is 10 to 100 times faster than the first electronic computer, ENIAC, and the first transistor computer, TRADIC, in running the classical algorithm, Pan said.

It is the first quantum computing machine based on single photons that goes beyond the early classical computer, and ultimately paves the way to a quantum computer that can beat classical computers. This achievement was published online in the latest issue of Nature Photonics this week.

http://www.ecns.cn/2017/05-03/255864.shtml

Tremendous news. It is amazing how quickly China is making substantial gain in this field. China has put tremendous effort and resources realizing that quantum computing is the future which has the potential to radically change many applications in use today. Any nation laying its hands on this tech has secured the future. This is more than prestige. Imagine such immense horsepower driving research on medicine, space exploration, artificial intelligence etc. Imagine the gains and advancements that could be made which prior to quantum computing were inconceivable. Mind boggling. We can only admire China's drive and ambition. This really demonstrates where China is heading. This is an entirely different league.

 

[武成王]

Besides quantum computing experiments, Chinese scientists also contribute in quantum computing theory, e.g. Andrew Chi Chih Yao https://en.wikipedia.org/wiki/Andrew_Yao,
who is presently the only Asian winner of Turing Award. Another one is MingSheng Ying, who is currently Director of Centre for Quantum Computation and Intelligent Systems, University of Technology Sydney, Australia. http://www.quantum-lab.org/mingsheng/

Prof. Ying admit that US is still leading in RD of quantum computing, however China is rapidly catching up in one of his lecture hosted in Tsinghua Univesity.

The above news does not indicate that China is leading in RD of quantum computing, US still dominates this field, however China is a competitive rival in quantum computing.

 

[F-22Raptor]

@F-22Raptor I wanna see more spin from you.

Really? Your boasting about a computer that's not actually a quantum computer?

"The Chinese team admit that their machine is of no practical use as it only carries out this one highly complex form of calculation, but it highlights the future potential of quantum computing. The team’s research was formally published in the scientific journal Nature Photonics on Tuesday."

http://www.scmp.com/news/china/poli...scientists-claim-milestone-developing-quantum

In other words, China has made some progress, an that's all. There's nothing here that leads me to believe China has leaped ahead of the US in this field.

 

[Viet]

This is not a real quantum computer yet, but the success of Pan Jianwei and his team clearly demonstrates the pathway to build a real quantum computer that with more photons in control (thus higher computation speed).

Pan's quantum machine now can beat the early classical computers (e.g. ENIAC or TRADIC). Some one may laugh at this. But please keep in mind, the first step is always the most challenging step. We all know how the computation power grows after the first electronic computer ENIAC invented in 1940s'. We are very lucky, because we can watch a similar wave be replicated in the area of quantum computer.

Below is the conclusion part of Pan's publication on this breakthrough.

Conclusion and outlook
Owing to our development of the high-efficiency source of highly indistinguishable single photons and ultra-low-loss photonic circuits, the experiment demonstrated 3-boson sampling rate of 4.96 KHz is ~27,000 times faster than the best previous experiments using SPDC, and ~24,000 times faster than the recent work using passive demultiplexing (thus intrinsically inefficient) of quantum-dot single photons using incoherent excitation that limited the photon indistinguishability to 52%-64%. Meanwhile, we achieve the first 4- and 5-boson sampling using single-photon Fock state—which were formidable challenges before—and obtain high sampling rates of 151 Hz and 4 Hz, respectively. These multi-photon boson-sampling machines have also reached a computational complexity that can race against early classical computers. Under the specific racing rule in ref. 5, 9, 10, we could compare the required time for obtaining one output sample using the quantum machines with the simulated time for calculating one permanent using the published data of the early classical computers (see Supplementary Information). As shown in Table SII, the quantum photonic machines are provably faster for the boson-sampling task than ENIAC and TRADIC, the first electronic computer and transistorized computer.


Our work has demonstrated a clear, realistic pathway to build boson-sampling machines with many photons and fast rates. Using superconducting nanowire singlephoton detectors with reported efficiency of ~95% and antireflection optical coating, one can straightforwardly increase the 3-, 4-, and 5-boson sampling rates to 130 KHz, 12 KHz, and 1 KHz, respectively, and implement 14-boson-sampling with a count rate of 5/h (see Supplementary Information). A remaining challenge is to remove the crosspolarization in the confocal setup—used to extinguish the laser background—which reduced the single-photon source efficiency by half. Future work will focus on deterministic dot-micropillar coupling and developing side excitation to boost the single-photon source efficiency to over 74%, in which case we can expect 20-boson sampling rate of ~130/h, and an increasing quantum advantage over classical computation for larger number of photons.

you expect someone reads the stuff and understands the principle? do you understand it at all?

 

[j20blackdragon]

The computing power of a quantum computer grows exponentially with the number of quantum bits that can be manipulated.

For example, a quantum computer with 50 quantum bits would be more powerful in solving quantum sampling problems than today's fastest supercomputer, Sunway TaihuLight

In the superconducting quantum circuit system, a research team from Google, NASA and the University of California at Santa Barbara announced a high-precision manipulation of 9 superconducting quantum bits in 2015.

Now the Chinese team led by Pan, Zhu Xiaobo and Wang Haohua have broken that record. They independently developed a superconducting quantum circuit containing 10 superconducting quantum bits and successfully entangled the 10 quantum bits through a global quantum operation.

http://news.xinhuanet.com/english/2017-05/03/c_136254519.htm

 

[samsara]

A quantum leap for China's computing industry:
World's first quantum computing machine unveiled in Shanghai

https://twitter.com/x/status/859776337774432258

Chinese scientists have built the world's first quantum computing
machine that goes far beyond the early classical computers

https://twitter.com/x/status/859754031127961600

 

[Bussard Ramjet]

[QUOTE = "samsara, post: 9443160, member: 180543"] A quantum leap for China's computing industry:
World's first quantum computing machine unveiled in Shanghai
[MEDIA = twitter] 859776337774432258 [/ MEDIA]


Chinese scientists have built the world's first quantum computing
Machine that goes far beyond the early classical computers
[MEDIA = twitter] 859754031127961600 [/ MEDIA] [/ QUOTE]


It is by no means world's first quantum computing model.

@cirr @AndrewJin

Google is preparing chips with 30-50 qubits. AND, like a company they are NOT publishing papers in open science journals. They are already building technology.

https://www.technologyreview.com/s/...tepping-stone-to-quantum-computing-supremacy/

It is time that China spends more time developing things than talking about them, and publishing them in open journals.

 

[qwerrty]

Google is preparing chips with 30-50 qubits. AND, like a company they are NOT publishing papers in open science journals. They are already building technology.

https://www.technologyreview.com/s/...tepping-stone-to-quantum-computing-supremacy/

It is time that China spends more time developing things than talking about them, and publishing them in open journals.

that chip is for their d-wave machine, which nobody recognized as real quantum computer