Bell Inequality Violation with Two Remote Atomic Qubits
Abstract
We observe violation of a Bell inequality between the quantum states of two remote Yb+ 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2008
- DOI:
- 10.1103/PhysRevLett.100.150404
- arXiv:
- arXiv:0801.2184
- Bibcode:
- 2008PhRvL.100o0404M
- Keywords:
-
- 03.65.Ud;
- 03.67.Mn;
- 37.10.Ty;
- 42.50.Xa;
- Entanglement and quantum nonlocality;
- Entanglement production characterization and manipulation;
- Ion trapping;
- Optical tests of quantum theory;
- Quantum Physics
- E-Print:
- 4 pages, 4 figures