博客李淼

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2 posts · 1,670 views

这个博客的主要内容是八卦弦论、宇宙学以及相关的一些物理问题。 有时也风花雪月。 有时也胡说八道。 点击下面的链接查看所有的文章。

Miao Li
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  • September 4, 2009
  • 08:03 AM
  • 869 views

模拟黑洞

by Miao Li in 博客李淼

(《新发现》专栏,勿转)

无论对物理学家来说还是对公众,黑洞一直是引人入胜的话题。记得我开始读研究生时,看到一本专业书,上面画了很多黑洞塌缩的图以及霍金蒸发的图,上面画了很多光锥,以及蒸发出来的粒子。

在引力理论中,光锥几乎就是一切。在每一个时空点上,光锥就是光在各个方向走出来的锥面。想象一个只有一度空间的时空,空间和时间组成一个平........ Read more »

Genov, D., Zhang, S., & Zhang, X. (2009) Mimicking celestial mechanics in metamaterials. Nature Physics, 5(9), 687-692. DOI: 10.1038/nphys1338  

  • August 29, 2009
  • 03:51 AM
  • 801 views

隐形电磁斗篷

by Miao Li in 博客李淼

这里收集一些电磁斗篷文献。

实验上第一次实现电磁斗篷的文章,发表在Science上,是

Metamaterial Electromagnetic Cloak at Microwave Frequencies

摘要:

A recently published theory has suggested that a cloak of invisibility is in principle possible, at least over a narrow frequency band. We describe here the first practical realization of such a cloak; in our demonstration, a copper cylinder was “hidden” inside a cloak constructed according to the p........ Read more »

Schurig, D., Mock, J., Justice, B., Cummer, S., Pendry, J., Starr, A., & Smith, D. (2006) Metamaterial Electromagnetic Cloak at Microwave Frequencies. Science, 314(5801), 977-980. DOI: 10.1126/science.1133628  

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