Distribution of time-energy entanglement over 100 km fiber using superconducting single-photon detectors.
In this letter, we report an experimental realization of distributing entangled photon pairs over 100 km of dispersion-shifted fiber. In the experiment, we used a periodically poled lithium niobate waveguide to generate the time-energy entanglement and superconducting single-photon detectors to detect the photon pairs after 100 km. We also demonstrate that the distributed photon pairs can still be useful for quantum key distribution and other quantum communication tasks.
Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. qiangzh@stanford.edu
Qiang
Q
Zhang
Hiroki
H
Takesue
Sae Woo
SW
Nam
Carsten
C
Langrock
Xiuping
X
Xie
Burm
B
Baek
M M
MM
Fejer
Yoshihisa
Y
Yamamoto
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008962:Models, Theoretical; D010783:Photometry / Q000295:instrumentation* / Q000379:methods; D017785:Photons; D013685:Telecommunications / Q000295:instrumentation*