Entanglement distribution revealed by macroscopic observations
Journal Article
·
· Physical Review. A
- Institut fuer Experimentalphysik, Universitaet Wien, Boltzmanngasse 5, 1090 Vienna (Austria) and Institut fuer Quantenoptik und Quanteninformation, Oesterreichische Akademie der Wissenschaften, Boltzmanngasse 3, 1090 Vienna (Austria)
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.
- OSTI ID:
- 20974669
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 74; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Superposition of macroscopically distinct states means large multipartite entanglement
Manipulating mesoscopic multipartite entanglement with atom-light interfaces
Macroscopic observables
Journal Article
·
Thu Jan 14 23:00:00 EST 2010
· Physical Review. A
·
OSTI ID:21408138
Manipulating mesoscopic multipartite entanglement with atom-light interfaces
Journal Article
·
Mon Dec 14 23:00:00 EST 2009
· Physical Review. A
·
OSTI ID:21352304
Macroscopic observables
Journal Article
·
Mon Jan 31 23:00:00 EST 2005
· Physical Review. A
·
OSTI ID:20650037