Herbert G Winful 2006 New J. Phys. 8 101 doi:10.1088/1367-2630/8/6/101
The meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocities
Herbert G Winful
Show affiliationsWe 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.
- PACS
- Subjects
- Dates
-
Issue 6 (June 2006)
Received 21 January 2006
Published 13 June 2006
-
The meaning of group delay in barrier tunnelling: a re-examination of superluminal group velocities
Herbert G Winful 2006 New J. Phys. 8 101
-
A Three-Dimensional Deflagration Model for Type Ia Supernovae Compared with Observations
F. K. Röpke et al. 2007 ApJ 668 1132
-
Off-Center Ignition in Type Ia Supernovae. I. Initial Evolution and Implications for Delayed Detonation
F. K. Röpke et al. 2007 ApJ 660 1344
-
Fine control of self-compression dynamics in a femtosecond filament
Nickolai Zhavoronkov 2009 J. Opt. A: Pure Appl. Opt. 11 125201
-
Entanglement induced fluctuations of cold bosons
Ram Brustein and Amos Yarom J. Stat. Mech. (2008) P07025
-
Lorentzian wormholes generalize thermodynamics still further
Prado Martín-Moruno and Pedro F González-Díaz 2009 Class. Quantum Grav. 26 215010
-
R-matrix electron-impact excitation calculations along the F-like iso-electronic sequence
M C Witthoeft et al 2007 J. Phys. B: At. Mol. Opt. Phys. 40 2969
-
Vector coherent state representations, induced representations and geometric quantization: I. Scalar coherent state representations
S D Bartlett et al 2002 J. Phys. A: Math. Gen. 35 5599
Related review articles
What's this?- 3D photonic crystals for photon management in solar cells
- Tunable structural color in organisms and photonic materials for design of bioinspired materials
- Computational studies of a cut-wire pair and combined metamaterials