Dynamic Multi-Party Quantum Private Comparison Protocol with Single Photons in Both Polarization and Spatial-Mode Degrees of Freedom

2016 ◽  
Vol 55 (12) ◽  
pp. 5307-5317 ◽  
Author(s):  
Wen Liu ◽  
Yong-Bin Wang
Keyword(s):  
Degrees Of Freedom ◽  
Single Photons ◽  
Quantum Private Comparison ◽  
Spatial Mode ◽  
Private Comparison

scholarly journals High-Dimensional Pixel Entanglement: Efficient Generation and Certification

Quantum ◽  
2020 ◽  
Vol 4 ◽  
pp. 376
Author(s):  
Natalia Herrera Valencia ◽  
Vatshal Srivastav ◽  
Matej Pivoluska ◽  
Marcus Huber ◽  
Nicolai Friis ◽  
...  
Keyword(s):  
Carrying Capacity ◽  
Communication Systems ◽  
Degrees Of Freedom ◽  
State Of The Art ◽  
Quality Measurement ◽  
High Dimensional ◽  
Single Photons ◽  
Spatial Mode ◽  
Classical Communication ◽  
Entanglement Of Formation

Photons offer the potential to carry large amounts of information in their spectral, spatial, and polarisation degrees of freedom. While state-of-the-art classical communication systems routinely aim to maximize this information-carrying capacity via wavelength and spatial-mode division multiplexing, quantum systems based on multi-mode entanglement usually suffer from low state quality, long measurement times, and limited encoding capacity. At the same time, entanglement certification methods often rely on assumptions that compromise security. Here we show the certification of photonic high-dimensional entanglement in the transverse position-momentum degree-of-freedom with a record quality, measurement speed, and entanglement dimensionality, without making any assumptions about the state or channels. Using a tailored macro-pixel basis, precise spatial-mode measurements, and a modified entanglement witness, we demonstrate state fidelities of up to 94.4% in a 19-dimensional state-space, entanglement in up to 55 local dimensions, and an entanglement-of-formation of up to 4 ebits. Furthermore, our measurement times show an improvement of more than two orders of magnitude over previous state-of-the-art demonstrations. Our results pave the way for noise-robust quantum networks that saturate the information-carrying capacity of single photons.

Quantum Private Comparison Based on Phase Encoding of Single Photons

2014 ◽  
Vol 53 (9) ◽  
pp. 3191-3200 ◽  
Author(s):  
Yan-Bing Li ◽  
Ying-Jie Ma ◽  
Sheng-Wei Xu ◽  
Wei Huang ◽  
Yan-shuo Zhang
Keyword(s):  
Single Photons ◽  
Quantum Private Comparison ◽  
Phase Encoding ◽  
Private Comparison

NEW QUANTUM PRIVATE COMPARISON PROTOCOL WITHOUT ENTANGLEMENT

2012 ◽  
Vol 10 (06) ◽  
pp. 1250065 ◽  
Author(s):  
YU-GUANG YANG ◽  
JUAN XIA ◽  
XIN JIA ◽  
LEI SHI ◽  
HUA ZHANG
Keyword(s):  
Secret Sharing ◽  
Single Photons ◽  
Quantum Private Comparison ◽  
Private Comparison ◽  
Entanglement States

After analyzing the main quantum private comparison (QPC) protocols based on the entanglement states, we propose a new QPC protocol using only polarized single photons. It will be shown that entanglement is not necessary for QPC. Most importantly, it will be pointed out that QPC protocols can be constructed by adapting the current quantum three-party secret sharing models properly.

Efficient quantum private comparison employing single photons and collective detection

2012 ◽  
Vol 12 (2) ◽  
pp. 887-897 ◽  
Author(s):  
Bin Liu ◽  
Fei Gao ◽  
Heng-yue Jia ◽  
Wei Huang ◽  
Wei-wei Zhang ◽  
...  
Keyword(s):  
Single Photons ◽  
Quantum Private Comparison ◽  
Private Comparison ◽  
Collective Detection
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