Abstract
The entanglement measures which use a sum of spin-variance criteria for two spin-1/2 particles were discussed. Three inequalities, which exhibited concatenating properties, showed greater sensitivities than a Bell's measurement while each requiring fewer measurements than a Bell's measurement to obtain. The simplest inequality requiring four measurements was efficient at testing for entanglement in down-conversion sources. Analysis shows that the most complex inequality, requiring twelve measurements shows a sensitivity equal to that of the Peres separability criterion for maximally polarized and Werner noise.
| Original language | English |
|---|---|
| Article number | 062320 |
| Pages (from-to) | 062320-1-062320-5 |
| Journal | Physical Review A - Atomic, Molecular, and Optical Physics |
| Volume | 70 |
| Issue number | 6 |
| DOIs | |
| State | Published - Dec 2004 |
| Externally published | Yes |
Bibliographical note
Funding Information:We gratefully acknowledge support from the NSF, the Research Corporation, and the University of Rochester.