Using the entangled two-photon systems, we experimentally demonstrate the predictions of the analog Clauser-Horne- Shimony-Holt （CHSH） inequality and investigate the robustness of the CHSH-class inequality in the bi...Using the entangled two-photon systems, we experimentally demonstrate the predictions of the analog Clauser-Horne- Shimony-Holt （CHSH） inequality and investigate the robustness of the CHSH-class inequality in the bit-flip noisy en- vironment. We obtain the experimental results of CHSH inequality and analog CHSH inequality as ScHsa=2.64±0.02 and SnalogCgS=2.76±0.02, respectively, and prove that the analog CHSH inequality is more robust against bit-flip noise than the CHSH inequality. It provides better advantages for the experimental study and application.展开更多
In this paper,by using the second-order parametric down-conversion of the nonlinear crystal,the spin-1 state is simulated by the two-photon polarization entangled modes. Through adjusting the laser pulse power density...In this paper,by using the second-order parametric down-conversion of the nonlinear crystal,the spin-1 state is simulated by the two-photon polarization entangled modes. Through adjusting the laser pulse power density,the efficiency of second-order parametric down-conversion is enhanced. The intensity of the spin-1 state is 0.5/s. The fidelity of the state is up to F=0.891±0.002,and the contrast is C=17.3. The results provide a new method for Stern-Gerlach measurement on the spin-1 system.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11174224,11404246 and 11447225)the Natural Science Foundation of Shandong Province(Nos.ZR2013FM001,BS2015DX015 and ZR2014JL029)
文摘Using the entangled two-photon systems, we experimentally demonstrate the predictions of the analog Clauser-Horne- Shimony-Holt （CHSH） inequality and investigate the robustness of the CHSH-class inequality in the bit-flip noisy en- vironment. We obtain the experimental results of CHSH inequality and analog CHSH inequality as ScHsa=2.64±0.02 and SnalogCgS=2.76±0.02, respectively, and prove that the analog CHSH inequality is more robust against bit-flip noise than the CHSH inequality. It provides better advantages for the experimental study and application.
基金supported by the Natural Science Foundation of China(Nos.11174224,11404246 and 11447225)the Natural Science Foundation of Shandong Province(Nos.ZR2013FM001,2013SJGZ10,BS2015DX015 and ZR2014JL029)the Science and Technology Development Program of Shandong Province(Nos.2011YD01049 and 2013YD01016)
文摘In this paper,by using the second-order parametric down-conversion of the nonlinear crystal,the spin-1 state is simulated by the two-photon polarization entangled modes. Through adjusting the laser pulse power density,the efficiency of second-order parametric down-conversion is enhanced. The intensity of the spin-1 state is 0.5/s. The fidelity of the state is up to F=0.891±0.002,and the contrast is C=17.3. The results provide a new method for Stern-Gerlach measurement on the spin-1 system.
