2004/01/26 by D. Sokolovski, Sokolovski, D., A. Z. Msezane +3
Engineering · Physics and Astronomy · #FOS: Physical sciences #Quantum Physics (quant-ph) #Quantum optics and atomic interactions #Random lasers and scattering media #Terahertz technology and applications #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0401159
openalex publication_date 2004/01/26 · arxiv created 2004/06/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 τ spent in the barrier is uncertain, whereas when τ 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.