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China Quantum Supremacy?

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http://m.scmp.com/news/china/economy/article/2140860/china-winning-race-us-develop-quantum-computers
Is China winning race with the US to develop quantum computers?
Chinese funding to research the next generation in computing may be dwarfing American efforts, according to US experts

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BloombergUPDATED : Monday, 9 Apr 2018, 9:51PM


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As the US and China threaten to impose tariffs on goods from aluminium to wine, the two nations are waging a separate economic battle that could determine who owns the next wave of computing.

Chinese universities and US technology companies such as IBM and Microsoft are racing to develop quantum computers, a type of processing that is forecast to be so powerful it can transform how drug makers, agriculture companies and car manufacturers discover compounds and materials.

Quantum computing uses the movement of subatomic particles to process data in amounts that modern computers cannot handle. Mostly theoretical now, the technology is expected to be able to perform calculations that make today’s computers look akin to an abacus.

While overall spending by China is unknown, its government is building a US$10 billion National Laboratory for Quantum Information Sciences in Hefei, Anhui province, which is due to open in 2020. US-funded research in quantum is about US$200 million a year, according to a July 2016 government report, and some researchers and companies do not believe that is enough.

China hits milestone in developing quantum computer ‘to eclipse all others’

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At the same time, it could break encryption that was on a classical computer. “An organisation or a nation that had quantum computer technologies would have a significantly easier time of wreaking havoc on other systems,” he said.

US President Donald Trump accused the Chinese government in March of stealing intellectual property by forcing American companies to share their most valuable secrets and sign joint venture agreements with local firms if they want to operate in China, although there are no specific allegations regarding quantum computers.

China has also been aggressive in pushing home-grown innovation as it supports companies in obtaining patents and trademarks around the world and has increased its research funding. In its annual scorecard, the Organisation for Economic Cooperation and Development called China “the second largest scientific powerhouse”, behind the US.

Technology companies from Microsoft to IBM to Alphabet’s Google view quantum computing as the next revolution.

“Over time, quantum in the field of computation is so important is that it will redefine the category of computers themselves,” said Dario Gil, vice-president of IBM’s Artificial Intelligence research. “It is the future of computing.”

China building world’s biggest quantum research facility

IBM’s inventions may be having the most impact on the nascent field when judged by the number of times its research has been cited by others in their patent applications. The Armonk, New York-based company already has developed computers being tested by customers, including Oak Ridge National Laboratory in Tennessee, the Energy Department’s biggest lab, as well as finance companies like JPMorgan Chase & Co and Barclays, Gil said.

Intel, which started its own programme two years ago, said the technology promises to be “transformational”.

“There are many tough problems to solve before quantum computing is a commercial reality,” said Jim Clarke, director of quantum hardware at Intel. “Some of these problems involve materials science, quantum chip design and manufacturing – those are sweet-spot problems for Intel.”

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Clarke said Intel was competitive in the number of patents it is seeking, although many are not yet public. Applications are made public after 18 months.

While there will still be a place for what’s being called “classical computers” – a category that includes modern smartphones and even super computers – the quantum computers could have “an infinite number of applications” in the fields of life sciences, chemistry and agriculture, said IBM’s Gil.

It is too early to say which company or country will be the leader in quantum computers, although at this stage it looks like US companies will excel in hardware while Chinese and Japanese ones are focused on the software and applications, Patinformatics’ Trippe said.

“Japanese and Chinese companies aren’t as concerned about building them as they are about how they’ll be used,” Trippe said. “They’ve started to patent the potential. The next five years are going to be pretty fascinating.”

The US China Economic and Security Review Commission, created by Congress in 2000 to assess national security implications of bilateral trade between the countries, said in its most recent report that China “has closed the technological gap” with the US in quantum information science, a sector Americans have long dominated, “due to a concerted strategy by the Chinese government and inconsistent and unstable levels of R&D funding and limited government coordination by the United States”.

Chinese satellite makes breakthrough in quantum communication

Studies by the US Chamber of Commerce and Bloomberg have independently shown that China is rising in its overall score for innovation, which includes education, government research and the number of patents. The World Intellectual Property Organisation reported March 21 that China is closing in on the US in filing international patent applications.

Quantum physics is one area in which the Chinese government, through its Ministry of Science and Technology, is strengthening its technological prowess, according to a report by the US Trade Representative that laid the groundwork for Trump’s tariff plans. The China Academy of Sciences and Peking University are among the Chinese research firms seeking more patents on quantum information technology, according to Patinformatics.

The Chinese government invested by giving a lot of money to companies and researchers to “replicate what we did in the US and elsewhere”, said Carl Williams, deputy director of the Physical Measurement Laboratory at the US National Institute of Standards and Technology. “They’ve come a long way.”

The Chinese researchers are focused on encryption, based on their patent applications. In August 2016, China’s state news agency said the government had launched the world’s first quantum communications satellite and a year later claimed to have sent the first “unbreakable” code from space.

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“That should be very scary,” said Jonathan Dowling, co-director of Louisiana State University’s Hearne Institute for Theoretical Physics, “at least to the intelligence agencies.”

In the US, the Department of Energy, Naval Research Lab and defence contractor Northrop Grumman Corp are among the government entities or contractors researching quantum computers. Overall, though, the US government has cut back on its own funding of computing and cryptography hardware, Dowling said.

Alibaba Cloud steps up its game as it offers quantum computing service

A July 2016 report by the National Science and Technology Council under former President Barack Obama recommended it be “considered a priority for federal coordination and investment”.

In the coming age of quantum, it is an open question whether federal funding will enable the US to maintain the edge it has had during the PC era and smartphone wars. Scott Crowder, IBM’s chief technology officer for quantum computing, told a House panel in October that “the US government investment in driving this critical technology is not sufficient to stay competitive”.

LSU’s Dowling said it could mean the US comes out the loser in the quantum race.

“What we’re seeing is a bunch of different things going on at once with no overall organisation,” Dowling said, “unlike in China, where they are exactly sure what they’re doing.”




Who is currently winning in the race for quantum supremacy?
 
. . . .
Chinese scientists develop a photonic quantum chip for boosting analog quantum computing

2018-05-14 10:24 Xinhua Editor: Gu Liping

Chinese scientists demonstrated the first two-dimensional quantum walks of single photons in real spatial space, which may provide a powerful platform to boost analog quantum computing.

They reported in a paper published on Friday in the journal Science Advances a three-dimensional photonic chip with a scale up to 49-multiply-49 nodes, by using a technique called femtosecond direct writing.

Jin Xianmin, a quantum communication researcher with Shanghai Jiaotong University, who led the study, told Xinhua, it is the largest-scaled chip reported so far that allows for the realization of this two-dimensional quantum walk in real spatial space, and potential exploration for many new quantum computing tasks.

Jin and his colleague showed that the dimension and scale of quantum system could be employed as new resources for boosting the quantum computing power.

The researchers said, universal quantum computers came under the spotlight since last year, as IBM, Google, Intel and the rivals constantly competed to announce their new records on the achieved number of qubits.

However, universal quantum computers are far from being feasible before error correction and full connections between the increasing numbers of qubits could be realized.

In contrast, analog quantum computers, or quantum simulators, can be built in a straightforward way to solve practical problems directly without error correction, and potentially be able to beat the computational power of classical computers in the near future.

Quantum walk in a two-dimensional array is a strikingly powerful and straightforward approach to analog quantum computing. It maps certain computing tasks into the coupling matrix of the quantum paths, and provides efficient solutions to those even classically intractable problems.

Prominent quantum advantages will be promptly achievable as long as the scale of quantum systems goes above a considerably large level.

During the past two decades, a traditional and challenging method has been through increasing the photon number, which suffers from probabilistic generation of single photons and multiplicative loss, according to the researchers.

This ingenuous alternative way from increasing the external physics dimension and complexity of the quantum evolution system may accelerate future analog quantum computing, said Jin.
 
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[D-wave quantum company]When attending the D-wave learning conference last month, D-wave said that their quantum computers are the most advanced, ahead of IBM and GOOGLE, and have been modeling financial models and biological proteins with the University of Toronto.
I hope China will surpass them.and I asked, But they said at present, they are the best in the world.:yu:
 
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[D-wave quantum company]When attending the D-wave learning conference last month, D-wave said that their quantum computers are the most advanced, ahead of IBM and GOOGLE, and have been modeling financial models and biological proteins with the University of Toronto.
I hope China will surpass them.and I asked, But they said at present, they are the best in the world.:yu:
I heard D-wave is able to produce a lot of qubits, but their accuracy is really bad.
 
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Yes ,they also told accuracyis a common problem,needs to be solved (slowly)but ..not said they are"bad",
they said just like the early computers, accuracy was also bad.
then Slowly resolved before large-scale application.
so ...which one accuracy is better ?their quantum computers is best in the world,or no?...(I am just amateur:yes4:
 
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