Abstract
The coexistence relation of quantum effects is a fundamental structure, describing those pairs of experimental events that can be implemented in a single setup. Only in the simplest case of qubit effects is an analytic characterization of coexistent pairs known. We generalize the qubit coexistence characterization to all pairs of effects in arbitrary dimensions that belong to the von Neumann algebra generated by two projections. We demonstrate the presented mathematical machinery by several examples, and show that it covers physically relevant classes of effect pairs.
| Original language | English |
|---|---|
| Article number | 225301 |
| Number of pages | 22 |
| Journal | Journal of Physics A: Mathematical and Theoretical |
| Volume | 47 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 15 May 2014 |
| Externally published | Yes |
Keywords
- coexistence
- quantum effect
- two projections
- von Neumann algebra