Chinese Scientists Make Breakthrough in Quantum Computing

[TaiShang]

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

One step at a time in every conceivable and unconceivable fields. The Long March continues and has a long way
to go.

 

[AndrewJin]

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

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

@C130

They can't even win the race of wall building.....lmao

 

[Jlaw]

They can't even win the race of wall building.....lmao

The budget was not approved for trump wall.

 

[AndrewJin]

The budget was not approved for trump wall.

No wall, no make in america wall!!!

 

[terranMarine]

Didn't Trump said, Americans built the best walls in the world? No budget? No wall? Back peddling from earlier campaign promise? That's a shock

Anyway YAHOOOOOOOOOO , this news is the best news of the day

 

[GS Zhou]

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.

 

[jkroo]

Just read it. It's breaking

 

[艹艹艹]

great news

 

[TaiShang]

The budget was not approved for trump wall.

If no wall, American will never be great again. Upresidented!

Didn't Trump said, Americans built the best walls in the world? No budget? No wall? Back peddling from earlier campaign promise? That's a shock

Anyway YAHOOOOOOOOOO , this news is the best news of the day

Maybe Mexicans decided not to pay.

How about making Mexico pay for the next supercomputer?

 

[terranMarine]

If no wall, American will never be great again. Upresidented!



Maybe Mexicans decided not to pay.

How about making Mexico pay for the next supercomputer?

America poor? No way they couldn't afford the wall themselves? Maybe that's why they are pointing their guns at the South Koreans for the $1 bln bill. Maybe this time they have some cash for keeping Mexicans out of their border

 

[TaiShang]

America poor? No way they couldn't afford the wall themselves? Maybe that's why they are pointing their guns at the South Koreans for the $1 bln bill. Maybe this time they have some cash for keeping Mexicans out of their border

Because they lacked a meager $30 million to pay for the VERY FAKE (TM) kangaroo court, they let the Philippines change strategic camp, leaving Vietnam out in the cold.

I do not think Trump has money for anything other than "unmanned" Tomahawk missiles to rain down on empty fields in Syria.

Tremendous technology!

 

[terranMarine]

Because they lacked a meager $30 million to pay for the VERY FAKE (TM) kangaroo court, they let the Philippines change strategic camp, leaving Vietnam out in the cold.

I do not think Trump has money for anything other than "unmanned" Tomahawk missiles to rain down on empty fields in Syria.

Tremendous technology!

Trump is a billionaire himself, he should open his wallet and make US great again.

 

[Dungeness]

C919 maiden flight set for 05.05.2017:

View attachment 394408

Happy Cinco de Mayo!

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

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

 

[S10]

I thought D-Wave was the first quantum computer.

 

[Dungeness]

I thought D-Wave was the first quantum computer.

World's first quantum computer that surpasses ENIAC and TRADIC.