Abstract
We present a hitherto unknown fundamental limitation to a basic measurement: that of the position of a quantum object when the total momentum of the object and apparatus is conserved. This result extends the famous Wigner-Araki-Yanase theorem, and shows that accurate position measurements are only practically feasible if there is a large momentum uncertainty in the apparatus.
| Original language | English |
|---|---|
| Article number | 110406 |
| Pages (from-to) | 1-4 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 106 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 18 Mar 2011 |
Keywords
- Mathematical Physics