Quantum Communication with Orbital Angular Momentum

2020 ◽  
Author(s):  
David Bacco ◽  
Daniele Cozzolino ◽  
Beatrice Da Lio ◽  
Yunhong Ding ◽  
Karsten Rottwitt ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Quantum Communication

Interaction-free generation of orbital angular momentum entanglement

2016 ◽  
Vol 30 (05) ◽  
pp. 1650006
Author(s):  
Yuanyuan Chen ◽  
Dong Jiang ◽  
Xuemei Gu ◽  
Ling Xie ◽  
Lijun Chen
Keyword(s):  
Angular Momentum ◽  
Numerical Analysis ◽  
Orbital Angular Momentum ◽  
Degrees Of Freedom ◽  
Quantum Communication ◽  
Superposition State ◽  
Multiple Degrees Of Freedom ◽  
Free Generation ◽  
Infinite Range ◽  
Interaction Free Measurement

Due to the infinite range of possibly achievable degrees of freedom, orbital angular momentum (OAM) can tremendously increase the capacity of communication system. Here, we propose a scheme to generate OAM entanglement by using interaction-free measurement (IFM). As the superposition state of the quantum absorption object is not changed after IFM, our scheme can be extended to multiparty easily. The numerical analysis results show that the fidelity of generated OAM entanglement can be arbitrarily close to unity. Besides, the implementation issues are also discussed to evaluate the feasibility in experiment. This OAM entanglement with multiple degrees of freedom will play a key role in distributed entanglement computing and efficient quantum communication.

Research Progress on Photon Orbital Angular Momentum in Quantum Communication Applications

2012 ◽  
Vol 49 (8) ◽  
pp. 080003
Author(s):  
郭建军 Guo Jianjun ◽  
郭邦红 Guo Banghong ◽  
程广明 Cheng Guangming ◽  
谢良文 Xie Liangwen ◽  
廖常俊 Liao Changjun ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Quantum Communication ◽  
Research Progress

The analysis of high-capacity quantum secure direct communication using polarization and orbital angular momentum of photons

2019 ◽  
Vol 34 (02) ◽  
pp. 2050017 ◽  
Author(s):  
Lin-Yi Li ◽  
Tie-Jun Wang ◽  
Chuan Wang
Keyword(s):  
Angular Momentum ◽  
Quantum Information ◽  
Channel Capacity ◽  
Orbital Angular Momentum ◽  
Quantum Communication ◽  
High Capacity ◽  
Quantum Secure Direct Communication ◽  
Noise Elimination ◽  
Long Distance ◽  
Direct Communication

Higher channel capacity and noise elimination are the key requirements for the implementation of long-distance quantum communication. As the additional degrees of freedom (DoF) of photons can be employed to achieve higher channel capacity and security beyond the polarizations DoF of photons, the photonic qubits are always employed as the flying qubits in quantum communication and quantum information processing. Here, exploiting the multiple DoFs of photons, we present an efficient quantum secure direct communication protocol based on the coding and manipulation of qubits on both the polarization and the orbital angular momentum of photons. Also, the numerical simulation is studied to further clarify the improvement of the channel capacity and the security. It is found that the channel capacity and the error rate (caused by eavesdropping) of the QSDC protocol which encoded on the polarization DoF and the OAM DoF is significantly higher than that of coding on only polarization DoF. We believe this work could provide more evidence for the applications of higher-dimensional qubits in quantum information science.

scholarly journals Single-End Adaptive Optics Compensation for Emulated Turbulence in a Bi-Directional 10-Mbit/s per Channel Free-Space Quantum Communication Link Using Orbital-Angular-Momentum Encoding

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Cong Liu ◽  
Kai Pang ◽  
Zhe Zhao ◽  
Peicheng Liao ◽  
Runzhou Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Adaptive Optics ◽  
Orbital Angular Momentum ◽  
Quantum Communication ◽  
Forward Direction ◽  
Symbol Error Rate ◽  
Communication Link ◽  
Data Encoding ◽  
Wavefront Distortion ◽  
Turbulence Effects

A single-end adaptive-optics (AO) module is experimentally demonstrated to mitigate the emulated atmospheric turbulence effects in a bi-directional quantum communication link, which employs orbital angular momentum (OAM) for data encoding. A classical Gaussian beam is used as a probe to detect the turbulence-induced wavefront distortion in the forward direction of the link. Based on the detected wavefront distortion, an AO system located on one end of the link is used to simultaneously compensate for the forward and backward channels. Specifically, with emulated turbulence and when the probe is turned on, the mode purity of photons carrying OAM l=1 is improved by ~ 21 % with AO mitigation. We also measured the performance when encoding data using OAM {l=-1,+2} and {l=-2,+1} in the forward and backward channels, respectively, at 10 Mbit/s per channel with one photon per pulse on average. For this case, we found that the AO system could reduce the turbulence effects increased quantum-symbol-error-rate (QSER) by ~ 76 % and ~ 74 %, for both channels in the uni-directional and bi-directional cases, respectively. Similar QSER improvement is observed for the opposite direction channels in the bi-directional case.

scholarly journals Single-End Adaptive Optics Compensation for Emulated Turbulence in a Bi-Directional 10-Mbit/s per Channel Free-Space Quantum Communication Link Using Orbital-Angular-Momentum Encoding

Research ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Cong Liu ◽  
Kai Pang ◽  
Zhe Zhao ◽  
Peicheng Liao ◽  
Runzhou Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Adaptive Optics ◽  
Orbital Angular Momentum ◽  
Quantum Communication ◽  
Forward Direction ◽  
Symbol Error Rate ◽  
Communication Link ◽  
Data Encoding ◽  
Wavefront Distortion ◽  
Turbulence Effects

A single-end adaptive-optics (AO) module is experimentally demonstrated to mitigate the emulated atmospheric turbulence effects in a bi-directional quantum communication link, which employs orbital angular momentum (OAM) for data encoding. A classical Gaussian beam is used as a probe to detect the turbulence-induced wavefront distortion in the forward direction of the link. Based on the detected wavefront distortion, an AO system located on one end of the link is used to simultaneously compensate for the forward and backward channels. Specifically, with emulated turbulence and when the probe is turned on, the mode purity of photons carrying OAM l=1 is improved by ~ 21 % with AO mitigation. We also measured the performance when encoding data using OAM {l=-1,+2} and {l=-2,+1} in the forward and backward channels, respectively, at 10 Mbit/s per channel with one photon per pulse on average. For this case, we found that the AO system could reduce the turbulence effects increased quantum-symbol-error-rate (QSER) by ~ 76 % and ~ 74 %, for both channels in the uni-directional and bi-directional cases, respectively. Similar QSER improvement is observed for the opposite direction channels in the bi-directional case.

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