Abstract
The mean arrival time of free particles is computed using the quantum-mechanical probability current. This is uniquely determined in the nonrelativistic limit of Dirac equation, although the Schrödinger probability current has an inherent nonuniqueness. Since the Dirac probability current contains 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 nonrelativistic regime.
| Original language | English |
|---|---|
| Pages (from-to) | 5 |
| Number of pages | 1 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 68 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2003 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
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