Breakthrough: Chinese scientists develop world-leading quantum computing thermometer

A significant leap forward in quantum computing technology has been achieved by researchers in China, as Anhui Quantum Computing Engineering Research Center announced that a high-performance anti-interference ruthenium oxide thermometer had been successfully developed by Chinese scientists, Science and Technology Daily reported on Sunday. 

The thermometer developed by QuantumCTek, which boasts a starting temperature close to 6 millikelvin (mK), not only set a new record within China but also marked a crucial step which places China's ultra-low temperature measurement technology for superconducting quantum computing at the forefront of global advancements.

Core component, crucial function

Ruthenium oxide thermometers play a vital role in quantum computers. They function by precisely measuring the temperature of the working environment within quantum chips.

As explained by technology expert Li Xu from QuantumCTek, "absolute zero" (around minus 273.15 degrees Celsius), also known as 0 Kelvin, is often referred to as the "lowest temperature in the universe" and represents the theoretical limit for achievable thermodynamic temperatures.

Since quantum states are incredibly delicate, quantum chips require operation at conditions near "absolute zero." Even the slightest temperature fluctuation can lead to the loss of quantum information. Utilizing ruthenium oxide thermometers for accurate monitoring of a quantum chip's operating temperature is therefore essential for guaranteeing the stable operation of quantum computers and enhancing the accuracy and reliability of calculations performed by these powerful machines, said Li.

Wang Zhehui, deputy director of the Anhui Quantum Information Engineering Technology Research Center, hailed the new thermometer as a major step towards solidifying China's self-sufficiency and control over the entire superconducting quantum computing industry chain.

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