title: Lower bound on the speed of nonlocal correlations without locality and measurement choice loopholes.
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.
authors.affiliation: Shanghai Branch, National Laboratory for Physical Sciences at Microscale, Department of Modern Physics, University of Science and Technology of China, Shanghai 201315, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Yin
authors.forename: Yuan
authors.initials: Y
authors.lastname: Cao
authors.forename: Hai-Lin
authors.initials: HL
authors.lastname: Yong
authors.forename: Ji-Gang
authors.initials: JG
authors.lastname: Ren
authors.forename: Hao
authors.initials: H
authors.lastname: Liang
authors.forename: Sheng-Kai
authors.initials: SK
authors.lastname: Liao
authors.forename: Fei
authors.initials: F
authors.lastname: Zhou
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Wu
authors.forename: Ge-Sheng
authors.initials: GS
authors.lastname: Pan
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Nai-Le
authors.initials: NL
authors.lastname: Liu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhang
authors.forename: Cheng-Zhi
authors.initials: CZ
authors.lastname: Peng
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Pan