Effect of atmospheric turbulence on orbital angular momentum entangled state

2021 ◽  
Author(s):  
Xiang Yan ◽  
Peng Fei Zhang ◽  
Cheng Yu Fan ◽  
Jing Hui Zhang
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Turbulent Atmosphere ◽  
Single Phase ◽  
Entangled State ◽  
Optical Wave ◽  
Optical Wave Propagation ◽  
Entangled Photon Pairs ◽  
Screen Model ◽  
Kolmogorov Theory

Abstract The entangled orbital angular momentum (OAM) photons propagating across a weakly turbulent atmosphere are investigated. Here, the paper uses the single-phase screen model based on the Kolmogorov theory of turbulence, especially focuses on the influence of the backward scattering on OAM evolution. The results indicate that the backward scattering plays an important role in the analysis of OAM entanglement evolution in the turbulent atmosphere. It can not be negligible especially for higher-order OAM mode. Moreover, when OAM mode is greater than 4, entangled photon pairs composed of higher OAM modes are not more robust in turbulence within the weak scintillation regime. These results will be useful in future investigations of OAM-based optical wave propagation through turbulent atmosphere.

scholarly journals Plasmon-assisted transmission of high-dimensional orbital angular-momentum entangled state

2006 ◽  
Vol 76 (5) ◽  
pp. 753-759 ◽  
Author(s):  
X. F Ren ◽  
G. P Guo ◽  
Y. F Huang ◽  
C. F Li ◽  
G. C Guo
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
High Dimensional ◽  
Entangled State

scholarly journals Continuous Variable Entanglement in Non-Zero Orbital Angular Momentum States

Proceedings ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Adriana Pecoraro ◽  
Filippo Cardano ◽  
Lorenzo Marrucci ◽  
Alberto Porzio
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Direct Detection ◽  
Hybrid Approach ◽  
Photon Number ◽  
Local Oscillator ◽  
Continuous Variable ◽  
Degree Of Freedom ◽  
Entangled State ◽  
Continuous Variables

Orbital angular momentum is a discrete degree of freedom that can access an infinite dimensional Hilbert space, thus enhancing the information capacity of a single optical beam. Continuous variables field quadratures allow achieving some quantum tasks in a more advantageous way with respect to the use of photon-number states. Here, we use a hybrid approach realizing bipartite continuous-variable Gaussian entangled state made up of two electromagnetic modes carrying orbital angular momentum. A q-plate is used for endowing a pair of entangled beams with such a degree of freedom. This quantum state is then completely characterized thanks to a novel design of a homodyne detector in which also the local oscillator is an orbital angular momentum-carrying beams so allowing the direct detection of vortex modes quadratures.

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