Abstract
We observe violation of a Bell inequality between the quantum states of two remote ions separated by a distance of about 1 m with the detection loophole closed. The heralded entanglement of two ions is established via interference and joint detection of two emitted photons, whose polarization is entangled with each ion. The entanglement of remote qubits is also characterized by full quantum state tomography.
- Received 14 January 2008
DOI:https://doi.org/10.1103/PhysRevLett.100.150404
©2008 American Physical Society