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Test of relativistic time dilation with fast optical atomic clocks at different

已有 5822 次阅读 2007-11-18 16:04 |个人分类:生活点滴

Test of relativistic time dilation with fast optical atomic clocks at different velocities(时间相对论的论证)

Time dilation is one of the most fascinating aspects of special relativity as it abolishes the notion of absolute time. It was first observed experimentally by Ives and Stilwell in 1938 using the Doppler effect. Here we report on a method, based on fast optical atomic clocks with large, but different Lorentz boosts, that tests relativistic time dilation with unprecedented precision. The approach combines ion storage and cooling with optical frequency counting using a frequency comb. 7Li+ ions are prepared at 6.4% and 3.0% of the speed of light in a storage ring, and their time is read with an accuracy of 2times10-10 using laser saturation spectroscopy. The comparison of the Doppler shifts yields a time dilation measurement represented by a Mansouri–Sexl parameter Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, or to obtain a text description, please contact npg@nature.com, consistent with special relativity. This constrains the existence of a preferred cosmological reference frame and CPT- and Lorentz-violating 'new' physics beyond the standard model.

爱因斯坦的时间相对论终于在100多年以后得到了相对精确的证实:时间相对论是指,一个对象相对于另一对象移动的速度,会使时间加快或减慢。可以理解为,一个移动中的时钟秒针应比一个静止平放的时钟秒针跳动得快,这一现象称为“时间膨胀”。

时间相对论曾经预言:只要速度接近或达到光速,时间旅行将成为可能,星际旅行将成为可能!

2006年生命科学的一项研究发现,通过改变一个基因的作用,可以使细胞分裂周期逆转,这样的话,“返老还童”似乎成为可能。

科学和技术的飞速进步每时每刻多在改变着我们的观点,以前还是作为神话的故事情节在慢慢地实现,而且又在不断的产生着神话故事,而这些故事又会在不久的将来得以实现。

我作为生命科学研究者中的一员,为科学的进步而喝彩,同时也努力在学习,在思考,在实践和在创造新的神话!

同时我们应该很清楚的看到:许多人还在抵制科学的进步,在他们眼里,科学在破环现存的观念和现存的世界,科学的发展速度已经大大地超越了人们思想观的改变;因此我们在改变世界的同时应该唤省人们思想意识:我们已经生存在一个变化大于固化的世界里,新现象、新问题、新思想不断的涌现,要教会人们对接受这些事物的工具,科技和社会的进步才会得到和谐的进步!



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