Chinese Scientists Develop High-Performance Ruthenium Oxide Thermometer for Quantum Computing

In Short

• The ruthenium oxide thermometer developed by QuantumCTek starts at nearly 6 millikelvins, setting new national records for low-temperature measurement.
• Accurate temperature monitoring with ruthenium oxide thermometers is crucial for maintaining the stability and reliability of quantum processors operating near absolute zero.
• This development enhances China’s independent control over the superconducting quantum computing supply chain, reducing reliance on imported technologies.

Anhui Quantum Computing Engineering Research Center announced that Chinese scientists had successfully developed a high-performance anti-interference ruthenium oxide thermometer, marking a significant advancement in the field of quantum computing technology, as Science and Technology Daily reported. 

With a starting temperature of nearly 6 millikelvin (mK), the thermometer developed by QuantumCTek not only set new records in China but also represented a major advancement that positions China at the forefront of the world’s superconducting quantum computing ultra-low temperature measurement technology.

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Quantum computers rely heavily on the use of ruthenium oxide thermometers. They operate by accurately measuring the temperature at which quantum processors operate.

According to technology expert Li Xu from QuantumCTek, “absolute zero” (around minus 273.15 degrees Celsius), often known as 0 Kelvin, is the theoretical limit for practical thermodynamic temperatures and is also referred to as the “lowest temperature in the universe.”

Because of the extreme fragility of quantum states, quantum processors must operate at temperatures close to “absolute zero.” Quantum information can be lost due to even the smallest temperature variation. 

According to Li, a quantum computing specialist at QuantumCTek ensuring the steady operation of quantum computers and improving the precision and dependability of the computations carried out by these potent devices depend on the proper monitoring of a quantum chip’s operating temperature using ruthenium oxide thermometers.

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The new thermometer was praised by Wang Zhehui, deputy director of the Anhui Quantum Information Engineering Technology Research Center, as a significant step toward securing China’s dominance over the whole supply chain for superconducting quantum computing.

Wang Zehui said, “The successful development of the quantum ruthenium oxide thermometer will further enhance the independent controllability of China’s superconducting quantum computing industry chain.” 

Before, there were no locally made substitutes for China’s import-dependent ruthenium oxide thermometers that could measure temperatures below 10 millikelvins.

With a temperature measuring range of 6 to 200 millikelvin, the recently released locally-made thermometer has broken the previous national record for the lowest beginning temperature measurement. It also has great measurement sensitivity and accuracy, allowing for quick response times and continuous testing.

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