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In the extremely cold world just 4 degrees away from absolute zero, a materials revolution is unfolding that could change the future of quantum computing. This temperature is minus 269 degrees Celsius, nearly the lowest possible temperature in the universe. In such extreme conditions, most materials lose the ability to control light, but scientists have found the key breakthrough here.
Why is this temperature so important? Because it is the working temperature of quantum computers. At this temperature, quantum bits can maintain stable states to perform complex calculations. However, the challenge lies in how to precisely control and transmit quantum information at such low temperatures. This requires a special material that can operate in ultra-low temperature environments and efficiently manipulate optical signals.
展开剩余74%Scientists at the Nanoelectronics Research Center have made an exciting breakthrough: they have redesigned a crystal material called strontium titanate. This material can function at room temperature, but in ultra-low temperature environments, it exhibits unprecedented and amazing performance.
What is most surprising is that the modified strontium titanate creates a Pockels coefficient of 350 pm/V at 4 Kelvin (about minus 269 degrees Celsius), which is the highest value measured at such low temperatures to date. In simple terms, this means it can control optical signals with extremely high efficiency and almost no energy loss.
What is the significance of this breakthrough? Imagine building a highway in the world of quantum computers. This material not only enables quantum information to be transmitted faster and more accurately but also significantly reduces the size of quantum devices. More importantly, it paves the way for establishing a quantum computer network in the future, promising to be a key bridge connecting superconducting quantum processors and optical networks.
In the laboratory, researchers found that this modified strontium titanate has a unique feature: it does not become weaker at ultra-low temperatures, but instead exhibits stronger performance. This completely overturns people's understanding of how materials behave at extremely low temperatures.
This groundbreaking achievement has been published in the journal "Science," echoing another related study from Stanford University. Together, both studies demonstrate that by precisely controlling the properties of strontium titanate, scientists can adjust its performance as needed, opening up possibilities for the scalable production of future quantum devices.
From a more macro perspective, this discovery once again proves the importance of basic scientific research. In the field of quantum computing, China has already made several significant breakthroughs. As quantum computing moves toward practical applications, this new material that exhibits outstanding performance at ultra-low temperatures will undoubtedly play a key role in future quantum technology competitions.
In this cold world approaching absolute zero, an improved ordinary crystal is bringing warmth and hope for the future of quantum computing. This is not just a breakthrough in materials science but also an important step forward in advancing human technological civilization.
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