Interaction of independent single photons based on integrated nonlinear optics

被引:25
作者
Guerreiro, T. [1 ]
Pomarico, E. [1 ]
Sanguinetti, B. [1 ]
Sangouard, N. [1 ]
Pelc, J. S. [2 ]
Langrock, C. [2 ]
Fejer, M. M. [2 ]
Zbinden, H. [1 ]
Thew, R. T. [1 ]
Gisin, N. [1 ]
机构
[1] Univ Geneva, Appl Phys Grp, CH-1211 Geneva, Switzerland
[2] Stanford Univ, EL Ginzton Lab, Stanford, CA 94305 USA
关键词
DOWN-CONVERSION; QUANTUM; GENERATION; ENTANGLEMENT;
D O I
10.1038/ncomms3324
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The parametric interaction of light beams in nonlinear materials is usually thought to be too weak to be observed when the fields involved are at the single-photon level. However, such single-photon level nonlinearity is not only fundamentally fascinating but holds great potential for emerging technologies and applications involving heralding entanglement at a distance. Here we use a high-efficiency waveguide to demonstrate the sum-frequency generation between a single photon and a single-photon level coherent state. The use of an integrated, solid state, room temperature device and telecom wavelengths makes this type of system directly applicable to future quantum communication technologies such as device-independent quantum key distribution.
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页数:5
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