Abstract
In 1935 Schrodinger introduced the terms entanglement and steering in the context of the famous gedanken experiment discussed by Einstein, Podolsky, and Rosen (EPR). Here, we report on a sixfold increase of the observed EPR-steering effect with regard to previous experiments, as quantified by the Reid criterion. We achieved an unprecedented low conditional variance product of about 0.04 <1, where 1 is the upper bound below which steering is demonstrated. The steering effect was observed on an unconditional two-mode-squeezed entangled state that contained a total vacuum state contribution of less than 8%, including detection imperfections. Together with the achieved high interference contrast between the entangled state and a bright coherent laser field, our state is compatible with efficient applications in high-power laser interferometers and fiber-based networks for entanglement distribution. DOI: 10.1103/PhysRevA.87.022104
Original language | English |
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Article number | 022104 |
Number of pages | 5 |
Journal | Physical Review A |
Volume | 87 |
Issue number | 2 |
DOIs | |
Publication status | Published - 6 Feb 2013 |
Externally published | Yes |
Keywords
- EXPERIMENTAL GENERATION
- SQUEEZED-LIGHT
- REALIZATION
- PARADOX
- VIOLATION