We identify the universal mechanism that is responsible for superluminal (faster-than-light) traversal times as well as the narrowing of wave packets transmitted through various nondissipative media. This mechanism is shown to be predominantly destructive interference between successive wave-packet components traversing all accessible causally retarded paths. It strongly depends on wave-packet coherence and width, and can cause superluminal traversal not only in evanescent-wave “tunneling” but also in allowed propagation.
|Number of pages||5|
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|State||Published - 1 Jan 1996|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics