|
| related topics |
| {wave, scattering, interference} |
| {light, field, probe} |
| {time, wave, function} |
| {measurement, state, measurements} |
| {particle, mechanics, theory} |
| {energy, gaussian, time} |
| {spin, pulse, spins} |
| {photon, photons, single} |
| {time, systems, information} |
|
"Superluminal" tunnelling, quantum measurements and the speed of
information transfer
D. Sokolovski, A. Z. Msezane, V. R. Shaginyan
abstract: We exploit the analogy between tunnelling across a potential barrier and
Aharonov's weak measurements to resolve the long standing paradox between the
impossibility to exceed the speed of light and the seemingly 'superluminal'
behaviur of the tunnelling particle in the barrier. We demonstrate that
'superluminality' occurs when the value of the duration $\tau$ spent in the
barrier is uncertain, whereas when $\tau$ is known accurately, no
'superluminal' behaviur is observed. In all cases only subluminal durations
contribute to the transmission, which precludes faster-than-light information
transfer, as shown by a recent experiment.
- oai_identifier:
- oai:arXiv.org:quant-ph/0401159
- categories:
- quant-ph
- arxiv_id:
- quant-ph/0401159
- created:
- 2004-01-26
- updated:
- 2004-06-20
Full article ▸
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