Abstract
Consequences of relativistic causality for measurements of nonlocal characteristics of composite quantum systems are investigated. It is proved that verification measurements of entangled states necessarily erase local information. A complete analysis of measurability of nondegenerate spin operators of a system of two spin-1/2 particles is presented. It is shown that measurability of certain projection operators which play an important role in axiomatic quantum theory contradicts the causality principle.
| Original language | English |
|---|---|
| Pages (from-to) | 4331-4338 |
| Number of pages | 8 |
| Journal | Physical Review A |
| Volume | 49 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1994 |