SUPERLUMINALITY, PARELECTRICITY, AND EARNSHAWS THEOREM IN MEDIA WITH INVERTED POPULATIONS

被引：46
作者：
CHIAO, RY
BOYCE, J
机构：
[1] Department of Physics, University of California, Berkeley
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.73.3383
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Population inversion leads to the phenomena of superluminality, in which wave packets can propagate dispersionlessly near dc faster than c, and parelectricity, in which the dc susceptibility is negative, implying the levitation of a charge above a parelectric medium. Also, charges placed in a cavity surrounded by a parelectric medium form stable configurations, in seeming violation of Earnshaw's theorem. Einstein causality is not violated. © 1994 The American Physical Society.
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页码：3383 / 3386
页数：4
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