Abstract
What can we learn about entanglement between individual particles in macroscopic samples by observing only the collective properties of the ensembles? Using only a few experimentally feasible collective properties, we establish an entanglement measure between two samples of spin-1/2 particles (as representatives of two-dimensional quantum systems). This is a tight lower bound for the average entanglement between all pairs of spins in general and is equal to the average entanglement for a certain class of systems. We compute the entanglement measures for explicit examples and show how to generalize the method to more than two samples and multipartite entanglement.
| Original language | English |
|---|---|
| Article number | 050304(R) |
| Number of pages | 4 |
| Journal | Physical Review A |
| Volume | 74 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2006 |
Austrian Fields of Science 2012
- 103008 Experimental physics
Cite this
- APA
- Author
- BIBTEX
- Harvard
- Standard
- RIS
- Vancouver