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Lower bound on the speed of nonlocal correlations without locality and measurement choice loopholes
Juan Yin1, Yuan Cao, Hai-Lin Yong
1Shanghai Branch, National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
Abstract:
In their well-known paper, Einstein, Podolsky, and Rosen called the nonlocal correlation in quantum entanglement a "spooky action at a distance." If the spooky action does exist, what is its speed? All previous experiments along this direction have locality and freedom-of-choice loopholes. Here, we strictly closed the loopholes by observing a 12 h continuous violation of the Bell inequality and concluded that the lower bound speed of spooky action was 4 orders of magnitude of the speed of light if Earth's speed in any inertial reference frame was less than 10(-3) time the speed of light.
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