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The meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocities

dc.contributor.authorWinful, Herbert G.en_US
dc.date.accessioned2006-12-19T19:10:50Z
dc.date.available2006-12-19T19:10:50Z
dc.date.issued2006-06-01en_US
dc.identifier.citationWinful, 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.issn1367-2630en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/49056
dc.description.abstractWe 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.extent3118 bytes
dc.format.extent389437 bytes
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherIOP Publishing Ltden_US
dc.titleThe meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocitiesen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelPhysicsen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, MI 48109-2122, USAen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/49056/2/njp6_6_101.pdfen_US
dc.identifier.doihttp://dx.doi.org/10.1088/1367-2630/8/6/101en_US
dc.identifier.sourceNew Journal of Physics.en_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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