scholarly journals Single-Photon Frequency Conversion for Quantum Interface

Author(s):  
Yuanhua Li ◽  
Xianfeng Chen

Single-photon frequency conversion for quantum interface plays an important role in quantum communications and networks, which is crucial for the realization of quantum memory, faithful entanglement swapping and quantum teleportation. In this chapter, we will present our recent experiments about single-photon frequency conversion based on quadratic nonlinear processes. Firstly, we demonstrated spectrum compression of broadband single photons at the telecom wavelength to the near-visible window, marking a critical step towards coherent photonic interface. Secondly, we demonstrated the nonlinear interaction between two chirped broadband single-photon-level coherent states, which may be utilized to achieve heralding entanglement at a distance. Finally, we theoretically introduced and experimentally demonstrated single-photon frequency conversion in the telecom band, enabling switching of single photons between dense wavelength-division multiplexing channels. Moreover, quantum entanglement between the photon pair is maintained after the frequency conversion. Our researches have realized three significant quantum interfaces via single-photon frequency conversion, which hold great promise for the development of quantum communications and networks.

Author(s):  
Tong Xiang ◽  
Yuanlin Zheng ◽  
Yuanhua Li ◽  
Xianfeng Chen

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Risheng Cheng ◽  
Chang-Ling Zou ◽  
Xiang Guo ◽  
Sihao Wang ◽  
Xu Han ◽  
...  

Abstract Single-photon counters are single-pixel binary devices that click upon the absorption of a photon but obscure its spectral information, whereas resolving the color of detected photons has been in critical demand for frontier astronomical observation, spectroscopic imaging and wavelength division multiplexed quantum communications. Current implementations of single-photon spectrometers either consist of bulky wavelength-scanning components or have limited detection channels, preventing parallel detection of broadband single photons with high spectral resolutions. Here, we present the first broadband chip-scale single-photon spectrometer covering both visible and infrared wavebands spanning from 600 nm to 2000 nm. The spectrometer integrates an on-chip dispersive echelle grating with a single-element propagating superconducting nanowire detector of ultraslow-velocity for mapping the dispersed photons with high spatial resolutions. The demonstrated on-chip single-photon spectrometer features small device footprint, high robustness with no moving parts and meanwhile offers more than 200 equivalent wavelength detection channels with further scalability.


2018 ◽  
Vol 35 (5) ◽  
pp. 054202
Author(s):  
Ce Shi ◽  
Mu-Tian Cheng ◽  
Xiao-San Ma ◽  
Dong Wang ◽  
Xianshan Huang ◽  
...  

2013 ◽  
Vol 88 (5) ◽  
Author(s):  
Susanne Blum ◽  
G. A. Olivares-Rentería ◽  
Carlo Ottaviani ◽  
Christoph Becher ◽  
Giovanna Morigi

2015 ◽  
Vol 40 (11) ◽  
pp. 2489 ◽  
Author(s):  
X. Zhang ◽  
I. Jizan ◽  
J. He ◽  
A. S. Clark ◽  
D.-Y. Choi ◽  
...  

Laser Physics ◽  
2015 ◽  
Vol 25 (6) ◽  
pp. 065201 ◽  
Author(s):  
Anshou Zheng ◽  
Guangyong Zhang ◽  
Liangwei Gui ◽  
Jibing Liu

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