澳门国际永利总站官网:Engaging photons in light conversation

 作者:涂堍遗     |      日期:2019-03-15 02:12:00
By Mark Buchanan Andrew Greentree wants to play tricks with light. At the University of Melbourne in Australia he’s aiming to do something to photons that no one has done before: trap them in cages and make them talk to each other. Unlike particles of matter such as electrons, photons are notoriously unsociable. They pass like ships in the night, even going straight through one another without noticing. Yet if they could be made to interact they might be compelled to form a peculiar new kind of quantum material – one made of light. Though this wouldn’t be a material in the everyday sense of the word, like a solid you can touch, it would behave like one in some important ways. Materials get their characteristic properties from the way the atoms within them interact, and the more we know about this, the more we can do with them. Likewise, the way photons interact when they form a quantum material could give us insights into how real materials with quantum properties work. This could, for example, help us explain exactly why high-temperature superconductors can make electricity flow with no resistance at all. Why is all this important? First,