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|Type:||Artigo de periódico|
|Title:||On superluminal motions in photon and particle tunnellings|
|Abstract:||It is shown that the Hartman-Fletcher effect is valid for all known expressions of the mean tunnelling time, in the various nonrelativistic approaches, for the case of finite width barriers without absorption, Than, we show that the same effect is not valid for the mean-square tunnelling time fluctuations. On the basis of the Hartman-Fletcher effect and the known analogy between photon and nonrelativistic-particle tunnelling, one can explain the superluminal group-velocities observed in various photon tunnelling experiments (without violation of the so-called 'Einstein causality'). (C) 1998 Elsevier Science B.V.|
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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