News on China's scientific and technological development.

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do you know what the temperature is?

:confused:

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Prof. PAN Jianwei and his colleagues CHEN Yuao and LIU Naile from the Hefei National Laboratory of Physics at the Microscale, working together with scientists in Australia and Canada, have successfully demonstrated a topological quantum error correction code for the first time. This marked a significant breakthrough in scalable fault-tolerant quantum computing. The paper was published in Nature as an article on Feb. 23, the issue commemorating the 100th anniversary of the birth of Alan Mathison Turing, the "Father of Computer".
Quantum computer is every scientist's dream due to its powerful computing ability over classical ones. However, a key obstacle to its realization – decoherence effect – has long baffled the scientists. That is to say, it has been impossible to avoid mistakes during the computing process as an unavoidable result of quantum computer's coupling with its environment. The error probability in every step has to be controlled under 10-5 orders, which is out of the reach of the experiments today.

In recent years, a brand new concept known as " topological error correction" have been put forward, i.e. using the topological feature of quantum in quantum correction, thus increasing the highest tolerable error probability in logical operation by 3 orders to 10-2 orders. Topological quantum error correction schemes greatly ease the demand on operation precision to a level attainable by present-day experimental techniques. Topological quantum error correction is therefore the quantum computing scheme with the highest error tolerance rate in today's world, and it makes scalable fault-tolerant quantum computing much easier.

Funded by Chinese Academy of Sciences, Ministry of Education and National Natural Science Foundation of China, PAN Jianwei and his team increased the brightness of two-photon states by 4-5 times, and that of eight photon entangling by 200 times at least through innovative experimental techniques, making what had been impossible a reality in mere 80 days. Moreover, researchers have also designed a special eight-photon interferometer to filter out noise and successfully created a topological eight-photon cluster state, which was used as a core resource in quantum computing to realize topological quantum error correction.

The research findings show single bit errors can be corrected completely during topological quantum computing, and the effective error probability related to the protected quantum can be greatly reduced when every quantum bit is making errors at the same probability.
This research has marked a milestone in quantum computing by taking the first step in experimenting scalable fault-tolerant quantum computing. It will boost the development of quantum computing by laying a solid foundation for quantum computing in real meaning. Referees of Nature commented the research as "Very important proof of principle experiment performed in a heroic 80-day quantum optics experiment. The experiment was well-done and extremely challenging." Prof. James Franson was invited to write an article in "News & Views" to introduce this research. Many leading popular journals such as Physics World by Institute of Physics, have reported this experiment.
 

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In January 16, research in Multi-Fields-Coupled Bonding System, which is one of the Equipment Projects of Chinese Academy of Sciences (CAS), passed acceptance test successfully. Experts from the Planning and Financial Division of CAS agreed that it is the first bonding system driven by multi- fields with fully independent intellectual property right, whose original and special self-adaptive pressure distribution adjust structure has been successfully applied to the hermetic package, LED (Light Emitting Diode) bonding package and other research fields. The research group in the Microelectronic Equipment Technology Department (Dept. No.8) of Institute of Microelectronics of the Chinese Academy of Sciences (IMECAS) realizes a brand-new innovative kind of macroscopic quantity preparation method on large-size and high-quality graphene, which is of great science significance and application value.

This bonding system was driven by multi-field coupling driving mode (electric field, temperature field and pressure field). It can accomplish anodic bonding, adhesive bonding, eutectic bonding, etc. Compared with existing bonding machine's rigid pressure structure, this system is more adaptive to the non-planarity, various thicknesses between pressure heads and heterogeneous films materials, avoiding material breakage during bonding process, which can improve fabrication uniformity and increase yield.

The development of this bonding system enlarges technical reserves for the China Next Generation Integrated Circuit (IC) Key Equipment having self-owned intellectual property.
 

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After accomplishing the 30-kilometer autonomous walking experiment in the Antarctic, the long-range rover developed by Shenyang Institute of Automation, Chinese Academy of Sciences (SIA) returned to Shenyang recently.

BU Chunguang, associate professor from SIA’s State Key Laboratory of Robotics and CHEN Cheng, doctoral student of the institute were responsible for field execution of the polar robot project. It is the second time for SIA’s polar robot research team to set their feet on the Antarctic continent after their first mission in 2007. The field experiment lasted from December 9, 2011 to February 5, 2012. During this period, the team conducted tests and verification on the locomotion mechanism, environmental perception, autonomous control and ice radar integration of the robot, and finished the 30-kilometer autonomous walking experiment, which is the first time for robots developed in China to continuously and autonomously travel such a long distance in the Antarctic.

According to follow-up arrangement, the polar robot team is planning to embark on the Antarctic continent for the third time, together with China’s Antarctic scientific research team on the latter’s thirtieth mission, and to formally conduct robotic application experiment in the Amery Ice Shelf of the Antarctic.

In the body design of the long-range rover, vibration-damping chassis, triangular pedrail, ackerman-steering, all wheel driver and fuel-driven technology are applied for the first time to ensure long-range, high-speed and stable walking, as well as high-efficiency driving and effective fuel utilization. In the design of autonomous control system, laser sensor with high rate and high resolution is installed. Algorithms and software for autonomous environmental perception, autonomous planning and control are developed, so that the tasks of drawing topographic map surrounding the robot, recognizing and avoiding obstacles and autonomous walking can be achieved smoothly. In the design of communication system, iridium data communication technology is employed to meet the demand of long-distance monitoring.

Polar scientific research is of profound strategic significanceto the world. However, the harsh field environment of the Antarctic could cause serious threat to the health and security of the researchers, and hinder the obtaining of research data. As a typical ground autonomous mobile robot, the long-range rover can independently transport various scientific instrument and equipment to the appointed area, assisting researchers in tasks such as meteorological sounding and ice layer thickness measurement. With its intelligence and autonomy, the robot can help or replace researchers in conducting large-range, long-time and long-distance field scientific research task, and is the development direction of the future.
 

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The China Association for Science and Technology (CAST) in Beijing has taken the lead among the country's publishers in trying to clamp down on academic misconduct. This month, it issued a declaration from the 1,050 journals it oversees — part of increasingly aggressive nationwide efforts to purge China’s corpulent scientific publishing industry and bring its home-grown journals, in both English and Chinese, up to international standards.

In the declaration, journal editors in chief and affiliated society presidents commit to following CAST guidelines issued in 2009. The document defines many types of fraud and lists possible penalties for miscreant authors — from written warnings to blacklisting or informing home institutions and funding agencies about the misconduct. Reviewers who abuse their privilege by, for example, plagiarizing an article, can also face blacklisting and public disclosure.

That is a step in the right direction, says Chun-Hua Yan, associate editor-in-chief of the CAST-administered Journal of Rare Earths, based in Beijing. Yan says that many editors had not been aware that some subtle forms of wrongdoing — such as favouring papers on the basis of personal relations or offering honorary authorship — were types of misconduct. “There are some soft or grey areas. These are now more clear to all the editors,” he says.

Suning You, president of the Chinese Medical Association Publishing House in Beijing, which has 126 journals administered by CAST, agrees. “The declaration will purify the academic environment to create first-class medical journals, thus achieving social and economic benefits,” he says.

Clampdown on misconduct


China’s academia and government alike have taken measures to curb misconduct in recent years, with institutions such as Zhejiang University in Hangzhou taking the lead (see Nature 481, 134–136; 2012). The CAST declaration itself follows the announcement of rules from China's education ministry that require universities to monitor misconduct closely (see Nature 483, 378–379; 2012).

The country’s roughly 5,300 home-grown journals have been a receptacle for much of the research that has resulted from misconduct. Two years ago, the government vowed to get rid of the most problematic publications (see Nature 467, 261; 2010), but that weeding process hasn’t happened yet.

Yan says that the latest declaration will put pressure on journals to fall in line. “Many are just commercial journals, just there to make money,” he says. “We cannot make an announcement that ‘these are bad journals’ but we can show the right way to publish.”

A stronger incentive — money — might force the issue. According to Yan, China's finance ministry is starting a programme that will spend 100 million renminbi (US$16 million) per year to improve journals. By the end of 2012, a committee will rank the country's publications into three tiers on the basis of their international and Chinese impact factors and other measures of international influence, such as the number of overseas subscriptions and the number of foreign editorial-board members. Journals ranked in the first tier will get a bonus of 100,000 renminbi per year, and those in the second, 50,000 renminbi. Third-tier publications will get nothing.

Yan says that the money could as much as double his journal’s current budget, and allow the publication to waive publishing fees for top papers, train young researchers in how to write scientific papers, invite international advisory-board members to China to discuss possible improvements and enhance software for electronic submission and review systems. He hopes that some Chinese-language journals will become internationally relevant, “followed by scientists around the world”.

But there are sceptics. Cong Cao, a science-policy researcher specializing in China at the University of Nottingham, UK, says that neither the extra funding nor the editors' declaration will have much of an impact. China's 5,300 journals account for roughly one-third of the world’s science and technology journals and, by Cao's estimate, publish around 600,000 papers per year. That, he says, “represents a huge business”. The journals attract “those who have to fill institutionally set publication requirements”, adds Cao. “The real question that China's scientific leadership as well as scientific publishers have to consider is: does China really need that many journals in the first place?”
 

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The Department of Electronics System Technology (Dept. No.6) in the Institute of Microelectronics of Chinese Academy of Sciences (IMECAS) made significant breakthroughs in key technology of low-power consumption sensor networks core chip and SoC (System on a Chip) recently. Two types (low-power consumption & high performance) of wireless sensor networks core chip and its SoC products self-developed by the cooperant research group led by Dept. No.6 had passed networking test in early November, 2011. Being the core communication chip in the Internet of Things (IoT) technology, it can provide chip support for the low-power consumption sensor network equipments and industrialization.

The project is special topic research in the project of New generation broadband wireless mobile communication network, one of the major national science and technology projects. The system-in-package (SiP) technology was used in the chip, which integrated 780MHz Radio Frequency (RF) circuit, baseband circuit, analog-to-digital converter (ADC), digital -to- analog converter (DAC), low-power consumption sensor Interface, micropoint control unit (MCU), static random access memory (SRAM), Flash and so on.

The performance of this chip is similar to those of overseas advanced product under the same power consumption, and the chip Integration is in leading position in domestic market.
The success in the project gave an impetus to the application of wireless sensor network (WSN) networking protocol with self-owned intellectual property rights and promoted the development of national new generation broadband wireless mobile communication network.
 

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The group led by Prof. PAN Jianwei and his colleagues, Chen Yuao and LU Chaoyang, has managed to entangle eight photons in the so-called Schrödinger's cat state for the very first time, breaking the previous six-photon world record set up by the same group in 2007. The related paper was published in Nature Photonics on 12 February.

Developing practical quantum computation heavily depends on the coherent manipulation of multiple quantum states. The full entangled multipartite Schrödinger's cat state is an important benchmark of quantum control.
With the long-term support from the China Academy of Sciences, Ministry of Science and Technology and National Natural Science Foundation of China, PAN Jianwei's team has been devoted to the research of this field. In 2004 and 2007 respectively, the team succeeded in manipulating the entanglement of five and six photons respectively, with the relevant papers published in Nature and Nature Physics.

After four years of hard work, the team brought the manipulation of photons to another level, and created world's best entanglement photon source in terms of brightness and purity. In early 2011, the team was the first to realize the eight-photon Schrödinger's cat state. According to the authors, the eight-photon state should allow them to demonstrate a powerful way of correcting quantum errors called topological error correction.
 

CottageLV

Banned Idiot
the article talked about high-temperature super conductor, but even the "hottest" super conductor is still beyond practical usage. so im curious what the the operating temperature is for those super magnets.
 

Quickie

Colonel
the article talked about high-temperature super conductor, but even the "hottest" super conductor is still beyond practical usage. so im curious what the the operating temperature is for those super magnets.

Probably doesn't really mean high temperature. The equipment look to be only air-cooled.
 
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