Abstract
We investigate the uncertainty associated with a joint quantum measurement of two spin components of a
spin- 1
2 particle and quantify this in terms of entropy. We consider two entropic quantities, the joint entropy and
the sum of the marginal entropies, and obtain lower bounds for each of these quantities. For the case of joint
measurements where we measure each spin observable equally well, these lower bounds are tight.
| Original language | English |
|---|---|
| Journal | Physical Review A |
| Volume | 80 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Oct 2009 |
Keywords
- entropic uncertainties
- joint quantum measurements
Cite this
Brougham, T., Andersson, E., & Barnett, S. M. (2009). Entropic uncertainties for joint quantum measurements. Physical Review A, 80(4). https://doi.org/10.1103/PhysRevA.80.042106