English News

All-Versus-Nothing Violation of Local Realism by Two-Photon, Four-Dimensional Entanglement

Date: 2006-02-28

   Tao Yang, Qiang Zhang, Jun Zhang, Juan Yin, Zhi Zhao, Marek Zukowski,
Zeng-Bing Chen, and Jian-Wei Pan
1.Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University  of Science and Technology of China, Hefei, Anhui 230026, China
2.Physikalisches Institut, Universita¨t Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany
3.Instytut Fizyki Teoretycznej i Astrofizyki Uniwersytet Gdan´ski, PL-80-952 Gdan´sk, Poland


We develop and exploit a source of two-photon, four-dimensional entanglement to report the first twoparticle  all-versus-nothing test of local realism with a linear optics setup, but without resorting to a  noncontextuality assumption. Our experimental results are in good agreement with quantum mechanics  while in extreme contradiction to local realism. Potential applications of our experiment are briefly  discussed.