The tunneling time for a wave packet as measured with a physical clock

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dc.creatorBegliuomini, Andrea
dc.creatorBracci, Luciano
dc.date1996-06-01
dc.date1996-06-08
dc.date.accessioned2026-07-07T09:08:55Z
dc.date.available2026-07-07T09:08:55Z
dc.descriptionWe study the time required for a wave packet to tunnel beyond a square barrier, or to be reflected, by envisaging a physical clock which ticks only when the particle is within the barrier region. The clock consists in a magnetic moment initially aligned with the $x$ axis which in the barrier region precesses around a constant magnetic field aligned with the $z$ axis, the motion being in the $y$ direction. The values of the $x$ and $y$ components of the magnetic moment beyond or in front of the barrier allow to assign a tunneling or reflection time to every fraction of the packet which emerges from the barrier and to calculate tunneling times $τ_{\rm T,x}$ and $τ_{\rm T,y}$ and reflection times $τ_{\rm R,x}$ and $τ_{\rm R,y}$. The times $τ_{\rm T,x}$ and $τ_{\rm T,y}$ ($τ_{\rm R,x}$ and $τ_{\rm R,y}$) are remarkably equal, and independent of the initial position (in front of the barrier) of the packet.
dc.description12 pages in REVTeX, submitted to Il Nuovo Cimento
dc.identifierhttps://arxiv.org/abs/quant-ph/9605045
dc.identifierhttp://arxiv.org/abs/quant-ph/9605045
dc.identifierNuovo Cim. B112 (1997) 603-612
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/150892
dc.subjectQuantum Physics
dc.titleThe tunneling time for a wave packet as measured with a physical clock
dc.typetext

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