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Increasing the statistical significance of entanglement detection in experiments
Bastian Jungnitsch, Sönke Niekamp, Matthias Kleinmann +6
Entanglement is often verified by a violation of an inequality like a Bell inequality or an entanglement witness. Considerable effort has been devoted to the optimization of such i…
200km Decoy-state quantum key distribution with photon polarization
Teng-Yun Chen, Jian Wang, Yang Liu +10
We demonstrate the decoy-state quantum key distribution over 200 km with photon polarization through optical fiber, by using super-conducting single photon detector with a repetiti…
Experimental Test of Bell inequalities with Six-Qubit Graph States
Wei-Bo Gao, Xing-Can Yao, Ping Xu +6
We report on the experimental realization of two different Bell inequality tests based on six-qubit linear-type and Y-shape graph states. For each of these states, the Bell inequal…
Experimental Realization of a Controlled-NOT Gate with Four-Photon Six-Qubit Cluster States
Wei-Bo Gao, Ping Xu, Xing-Can Yao +6
We experimentally demonstrate an optical controlled-NOT (CNOT) gate with arbitrary single inputs based on a 4-photon 6-qubit cluster state entangled both in polarization and spatia…
Entanglement assisted spin-wave atom interferometer
Yu-Ao Chen, Xiao-Hui Bao, Zhen-Sheng Yuan +3
We report the observation of phase-super resolution in a motion-sensitive spin-wave (SW) atom interferometer utilizing a NOON-type entanged state. The SW interferometer is implemen…
Generation of entangled coherent states for distant Bose-Einstein condensates via electromagnetically induced transparency
Le-Man Kuang, Zeng-Bing Chen, Jian-Wei Pan
In this paper, we propose a method to generate entangled coherent states between two spatially separated atomic Bose-Einstein condensates (BECs) via the technique of the electromag…
Decoy-state quantum key distribution with both source errors and statistical fluctuations
Xiang-Bin Wang, Lin Yang, Cheng-Zhi Peng +1
We show how to calculate the fraction of single photon counts of the 3-intensity decoy-state quantum cryptography faithfully with both statistical fluctuations and source errors. O…
Observation of prolonged coherence time of the collective spin wave of atomic ensemble in a paraffin coated Rb vapor cell
Shuo Jiang, Xiao-Ming Luo, Li-Qing Chen +5
We report a prolonged coherence time of the collective spin wave of a thermal 87Rb atomic ensemble in a paraffin coated cell. The spin wave is prepared through a stimulated Raman P…
Experimental Quantum Teleportation and Multi-Photon Entanglement via Interfering Narrowband Photon Sources
Jian Yang, Xiao-Hui Bao, Han Zhang +4
In this letter, we report a realization of synchronization-free quantum teleportation and narrowband three-photon entanglement through interfering narrowband photon sources. Since…