The meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocities
dc.contributor.author | Winful, Herbert G. | en_US |
dc.date.accessioned | 2006-12-19T19:10:50Z | |
dc.date.available | 2006-12-19T19:10:50Z | |
dc.date.issued | 2006-06-01 | en_US |
dc.identifier.citation | Winful, Herbert G (2006). "The meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocities." New Journal of Physics. 8(6): 101. <http://hdl.handle.net/2027.42/49056> | en_US |
dc.identifier.issn | 1367-2630 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/49056 | |
dc.description.abstract | We show that the group delay in tunnelling is not a traversal time but a lifetime of stored energy or stored probability escaping through both ends of the barrier. Because it is a lifetime associated with both forward (transmitted) and backward (reflected) fluxes, it cannot be used to define a group velocity for forward transit in cases where a wavepacket is mostly reflected. For photonic tunnelling barriers the group delay is identical to the dwell time which is also a property of an entire wavefunction with reflected and transmitted components. Theoretical predictions and experimental reports of superluminal group velocities in barrier tunnelling are re-interpreted. | en_US |
dc.format.extent | 3118 bytes | |
dc.format.extent | 389437 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | IOP Publishing Ltd | en_US |
dc.title | The meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocities | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, MI 48109-2122, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/49056/2/njp6_6_101.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1088/1367-2630/8/6/101 | en_US |
dc.identifier.source | New Journal of Physics. | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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