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On August 13, Google researchers created a millisecond time crystal using sycamore quantum computer. The researchers said that this new phase breaks through the current physics, or will greatly improve the computer processing ability. If all goes well, the field of quantum computing is expected to usher in a new breakthrough < p > time crystal sounds like a mysterious concept in science fiction movies, which can open channels to different universes. The "time stone" in Marvel's films can control the past, present and future < p > although this is still a fantasy, scientists have successfully created time crystals on the micro scale for many years. This does not drive starships, but is expected to provide energy for Ultra Powerful quantum computers < p > "time crystals are like a rest station on the road to building quantum computers," said Norman Yao, a molecular physicist at the University of California, Berkeley < p > Google claims that it has worked with physicists at Stanford University and Princeton University to develop a "scalable method" that can use the company's sycamore quantum computer to create time crystals < p > last month, the research team composed of 100 scientists published a paper on the research sharing platform arxiv.org, describing in detail that they created time crystals with an array of 20 qubits. According to this paper, scientists applied an algorithm to spin qubits up and down in experiments to produce a controllable system that can last "indefinitely long" < p > a time crystal is formed by arranging atoms in space in a repeated pattern in time. This design enables them to evolve over time with energy conservation. Due to the continuous evolution of the crystal throughout the time, it does not need too much energy input to maintain its own stability. This new phase may be useful for quantum computers that originally rely on extremely fragile qubits < p > at present, qubits in quantum computers are prone to errors and are very fragile, so it is difficult for researchers to control and intervene them. Yao Ying said that the time crystal may introduce a better method to maintain quantum computing < p > in addition, the field involved in this work is also the field that physicists have long hoped to make a breakthrough < p > "the result will be amazing: you broke the second law of thermodynamics," said Roderich Moessner, co-author of the paper < p > in 2012, Nobel Prize winning physicist Frank Wilczek first proposed the concept of time crystal. At first, he doubted whether atoms could be arranged in repeated patterns on the time axis like ordinary crystals < p > in essence, Wilczek wants to know whether a closed system can rotate, oscillate or move in a repetitive manner. Over the years, researchers around the world have more or less verified wilchek's point of view < p > over time, the definition of time crystal is extended to include objects activated by external effects such as vibration, stirring or laser bombardment < p > wilchek said, "this definition is uncertain. But if you want to call it a new state of matter, you want it to happen spontaneously, not externally. " < p > in the early validation experiments, ions were pumped by laser to make them oscillate. Wilchek added that this method is useful, but difficult to expand and reproduce < p > by 2017, scientists from Harvard University and the University of Maryland revealed that they had created micro scale time crystals in the cryogenic laboratory. Recently, a research team at Delft University of technology in the Netherlands also announced their method of using diamonds to construct time crystals Scientists say that time crystals can be imagined as perpetual motion machines that can break the second law of thermodynamics. Time crystal is also the first thing that spontaneously breaks the "time translation symmetry" < p > wilchek said that although Google's research work has only created millisecond time crystals, this research looks promising. He added that assuming that once the hardware is more advanced, the resulting time crystals will last longer < p > "nothing is eternal, even the protons in diamonds will eventually decay," wilchek said“ If you can create a time crystal that can last millions or thousands of cycles, you can support environmentally sensitive technologies. Even if it's not perfect, you can do a lot of things. "（ Chen Chen)

2023-03-22 10:04:40