Spin dependent observable effect for free particles using the arrival time distribution
Quantum Physics
2009-11-10 v2
Abstract
The mean arrival time of free particles is computed using the quantum probability current. This is uniquely determined in the non-relativistic limit of Dirac equation, although the Schroedinger probability current has an inherent non-uniqueness. Since the Dirac probability current involves a spin-dependent term, an arrival time distribution based on the probability current shows an observable spin-dependent effect, even for free particles. This arises essentially from relativistic quantum dynamics, but persists even in the non-relativistic regime.
Cite
@article{arxiv.quant-ph/0306106,
title = {Spin dependent observable effect for free particles using the arrival time distribution},
author = {Md. Manirul Ali and A. S. Majumdar and D. Home and S. Sengupta},
journal= {arXiv preprint arXiv:quant-ph/0306106},
year = {2009}
}
Comments
5 Latex pages, 2.eps figures; discussions sharpened and references added; accepted for publication in Physical Review A