Study on the superposition state for the generation of orbital-angular-momentum-carrying beam

2016 ◽  
Author(s):  
Hongyan Liu ◽  
Yongqiang Cheng ◽  
Yu-Liang Qin ◽  
Kang Liu ◽  
Tiezhu Yuan
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Superposition State

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.

All-silicon metasurfaces for polarization multiplexed generation of terahertz photonic orbital angular momentum superposition states

2021 ◽  
Vol 9 (16) ◽  
pp. 5478-5485
Author(s):  
Jie Li ◽  
Guocui Wang ◽  
Chenglong Zheng ◽  
Jitao Li ◽  
Yue Yang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Degrees Of Freedom ◽  
Engineering Application ◽  
Superposition State ◽  
Superposition States

The superposition state of photonic orbital angular momentum (OAM) has more degrees of freedom than pure photonic orbital angular momentum, with rich physical implications and engineering application possibilities.

Generating arbitrary cebits on the orbital angular momentum Poincaré sphere

2016 ◽  
Vol 14 (06) ◽  
pp. 1640032
Author(s):  
P. Chithrabhanu ◽  
A. Aadhi ◽  
Salla Gangi Reddy ◽  
Shashi Prabhakar ◽  
R. P. Singh
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Rotation Angle ◽  
Laser Beams ◽  
Superposition State ◽  
Sagnac Interferometer ◽  
Poincaré Sphere ◽  
General Complex ◽  
Poincare Sphere

Using classical laser beams, we generate a general complex superposition state, cebit, of orbital angular momentum (OAM) of light. We use a nonseparable beam of polarization and OAM generated by a modified Sagnac interferometer for the generation of OAM cebits which can be represented as points on the OAM Poincaré sphere. The general cebit state is represented as a function of the rotation angle of the wave plates so that one can easily generate the required state.

Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication

2018 ◽  
Author(s):  
Ryohei Yamagishi ◽  
Hiroto Otsuka ◽  
Ryo Ishikawa ◽  
Akira Saitou ◽  
Hiroshi Suzuki ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Loop Antennas

Highly dispersive coupled ring-core fiber for orbital angular momentum modes

2020 ◽  
Vol 117 (19) ◽  
pp. 191101
Author(s):  
Wenpu Geng ◽  
Yiqiao Li ◽  
Yuxi Fang ◽  
Yingning Wang ◽  
Changjing Bao ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Core Fiber ◽  
Ring Core
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