第四届企圖薺原子物理和量子信息音年喾者学术讨论会 Entanglement purification and faithful qubit transmission Fu-Guo Deng{邓富国) Department of Physics, Beijing Normal University, Beijing 100875 2010.8.5, Dalian
Entanglement purification and faithful qubit transmission Fu-Guo Deng (邓 富 国) 第四届全国冷原子物理和量子信息青年学者学术讨论会 Department of Physics, Beijing Normal University, Beijing 100875 2010. 8. 5, Dalian
Outline 1. Motivation 2. Entanglement purification 3. Faithful qubit transmission 4. Summary
Outline 1. Motivation 2. Entanglement purification 3. Faithful qubit transmission 4. Summary
1. Motivation EPR-Source Both long distance quantum teleportation or global quantum key distribution need to distribute a certain supply of pairs of particles in a maximally entangled state to two distant users
1. Motivation
Source and transmitter Tracking laser TransmitterICCD telescope BBO High-power aser La gomera Alice on La alma Bob on Tenerife Polarization compensation Polarization compensation BN因 Time 4、团B ggang 岛心 Polarization analyser Polarization analyser R Ursin et al, Entanglement-based quantum communication over 144km University of vienna, Nature Physics 3: 481-484(2007)
R. Ursin et al，Entanglement-based quantum communication over 144km， University of Vienna，Nature Physics 3：481-484 (2007)
Long-distance quantum communication Quantum repeater Entanglement: a) Generation b) Distribution c)Purification d) Swapping e)Storage Briegel et al., Phys. Rev. Lett.81, 5932(1998)
Long-distance quantum communication: Quantum repeater Briegel et al., Phys. Rev. Lett. 81, 5932 (1998) Entanglement: a) Generation b) Distribution c) Purification d) Swapping e) Storage