Synchronized independent narrow-band single photons and efficient generation of photonic entanglement.
We create independent, synchronized single-photon sources with built-in quantum memory based on two remote cold atomic ensembles. The synchronized single photons are used to demonstrate efficient generation of entanglement. The resulting entangled photon pairs violate a Bell's inequality by 5 standard deviations. Our synchronized single photons with their long coherence time of 25 ns and the efficient creation of entanglement serve as an ideal building block for scalable linear optical quantum information processing.
Yuan
Zhen-Sheng
ZS
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany.
Chen
Yu-Ao
YA
Chen
Shuai
S
Zhao
Bo
B
Koch
Markus
M
Strassel
Thorsten
T
Zhao
Yong
Y
Zhu
Gan-Jun
GJ
Schmiedmayer
Jörg
J
Pan
Jian-Wei
JW