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Superluminal Behaviour of Modified Bessel Waves |
| WANG Zhi-Yong;XIONG Cai-Dong |
| School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054 |
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| Cite this article: |
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WANG Zhi-Yong, XIONG Cai-Dong 2006 Chin. Phys. Lett. 23 2422-2425 |
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Abstract Much experimental evidence of superluminal phenomena has been available by electromagnetic wave propagation experiments, with the results showing that the phase time describes the barrier traversal time. Based on the extrapolated phase time approach and numerical methods, we show that, in contrast to the ordinary Bessel waves of real argument, the group velocities of modified Bessel waves are superluminal. We obtain the following results. The group velocities increase with the increase of propagation distance, which is similar to the evanescent plane-wave cases. For large wave numbers, the group velocities fall off as the wave numbers increase, which is similar to the evanescent plane-wave cases. For small wave numbers, the group velocities increase with the increase of wave numbers, this is different from the evanescent plane-wave cases.
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| Keywords:
41.20.Jb
42.25.Bs
03.65.Xp
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Published: 01 September 2006
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| PACS: |
41.20.Jb
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(Electromagnetic wave propagation; radiowave propagation)
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42.25.Bs
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(Wave propagation, transmission and absorption)
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03.65.Xp
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(Tunneling, traversal time, quantum Zeno dynamics)
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