China Makes the First Quantum Chip "Refrigerator", China's Innovations That Have Sparked International Interest

 

 China Makes the First Quantum Chip "Refrigerator"

Quantum chips have become an important development track for the semiconductor industry and a key component in the deployment of quantum computing technology.

The Chinese manufacturer Benyuan Quantum has built the first quantum chip production line in China, laying the foundation for the mass production of quantum chips in China.

Following the quantum chip production line, China has made another breakthrough in quantum technology and created a "quantum chip refrigerator".

China's first 'refrigerator' for quantum chips put into use to ...

Photo: Screenshot of video from Science and Technology Daily

China's first "refrigerator for quantum chips" has been put into use to maintain a stable environment and enable the smooth operation of quantum chips, scientists revealed on Wednesday.

The "refrigerator," actually a high-vacuum box, has three cavities for storage and each can be controlled separately.

A smart system monitors the cavities in real time to maintain a high-vacuum state, according to a statement by the developer of the device, Origin Quantum Computing Technology Co, which is based in East China's Anhui Province.

A human-computer interaction function guarantees automated operation of the device, read the statement.

The Global Times learned from Origin Quantum that compared with a classic integrated circuit, a quantum chip requires a more complicated manufacturing process. Temperatures and conditions in the chip's environment, such as noise, vibration, electromagnetic waves and even super-small particles, would have an impact on the quantum chip.

If the strict environmental conditions are not maintained, superconducting materials can easily react chemically with oxygen and water vapor in the air, absorbing various impurities. As a result, the key components of the chip may fail to burn in and would not function correctly.

Scientists have compared the burn-in process with "food going bad" in the air and dubbed the high-vacuum box as a "refrigerator for quantum chips."

Quantum chips are the "brains" of quantum computers, which use quantum mechanics to perform certain computations far more efficiently than a regular computer.

Although the general public is mostly unfamiliar with quantum computers and their capabilities, the Spring Festival box office hit The Wandering Earth II offered a fictional opportunity for people to comprehend the immense computing power these machines possess.

 

 Chinese #scientists develop #'quantum chip refrigerator' in breakthrough #china #fyp

 

China's Innovations That Have Sparked International Interest | Brics | China Technology

 #Chinatechnology #China #chinaeconomy China's Innovations That Have Sparked International Interest | Brics | China Technology 

Investigate China's various innovations, from the BRICS countries to cutting-edge technology, and understand how these have sparked an international interest. Learn about the impact China has had on the world, and how its projects have been duplicated around the globe.

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Quantum Computing? Quantum Bar Magnets in a Transparent Salt

ScienceDaily (June 15, 2012) — Scientists have managed to switch on and off the magnetism of a new material using quantum mechanics, making the material a test bed for future quantum devices.

This image shows the antiferromagnetic arrangement of the spins (colored arrows) in the magnetic salt used by the Swiss-German-US-London team. (Credit: University College London)

The international team of researchers led from the Laboratory for Quantum Magnetism (LQM) in Switzerland and the London Centre for Nanotechnology (LCN), found that the material, a transparent salt, did not suffer from the usual complications of other real magnets, and exploited the fact that its quantum spins -- which are like tiny atomic magnets -- interact according to the rules of large bar magnets. The study is published in Science.

Anybody who has played with toy bar magnets at school will remember that opposite poles attract, lining up parallel to each other when they are placed end to end, and anti-parallel when placed adjacent to each other. As conventional bar magnets are simply too large to reveal any quantum mechanical nature, and most materials are too complex for the spins to interact like true bar magnets, the transparent salt is the perfect material to see what's going on at the quantum level for a dense collection of tiny bar magnets.

The team were able to image all the spins in the special salt, finding that the spins are parallel within pairs of layers, while for adjacent layer pairs, they are antiparallel, as large bar magnets placed adjacent to each other would be. The spin arrangement is called "antiferromagnetic." In contrast, for ferromagnets such as iron, all spins are parallel.

By warming the material to only 0.4 degrees Celsius above the absolute "zero" of temperature where all classical (non-quantum) motion ceases, the team found that the spins lose their order and point in random directions, as iron does when it loses its ferromagnetism when heated to 870 Celsius, much higher than room temperature because of the strong and complex interactions between electron spins in this very common solid.

The team also found that they could achieve the same loss of order by turning on quantum mechanics with an electromagnet containing the salt. Thus, physicists now have a new toy, a collection of tiny bar magnets, which naturally assume an antiferromagnetic configuration and for which they can dial in quantum mechanics at will.

"Understanding and manipulating magnetic properties of more traditional materials such as iron have of course long been key to many familiar technologies, from electric motors to hard drives in digital computers," said Professor Gabriel Aeppli, UCL Director of the LCN.

"While this may seem esoteric, there are deep connections between what has been achieved here and new types of computers, which also rely on the ability to tune quantum mechanics to solve hard problems, like pattern recognition in images."

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