Journal
PHOTONICS RESEARCH
Volume 10, Issue 12, Pages 2828-2835Publisher
CHINESE LASER PRESS
DOI: 10.1364/PRJ.469340
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Funding
- National Natural Science Foundation of China
- National Key Research and Development Program of China
- [11874248]
- [12074233]
- [2016YFA0301404]
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This study reports the generation of continuous-variable high-dimensional entanglement using a single OPO cavity and verifies its entanglement in terms of frequency, spin, and orbital angular momentum. Furthermore, the advantages of high-dimensional entanglement in quantum communication and its potential applications in quantum protocols, quantum imaging, and quantum computing are demonstrated.
High-dimensional entanglement is a critical foundation for the growing demand for information capacity to implement the high-capacity quantum task. Here, we report continuous-variable high-dimensional entanglement with three degrees of freedom (frequency, polarization, and orbital angular momentum) directly generated with a single type-II optical parametric oscillator (OPO) cavity. By compensating both for dispersion in frequency modes and astigmatism in higher-order transverse modes, the OPO is capable of oscillating simultaneously and outputting thousands of entanglement pairs. The three degrees of freedom high-dimensional entanglement are verified simultaneously possessing frequency comb, spin, and orbital angular momentum entanglement via 14 pairs of Hermite-Gaussian mode correlations measurement. Then, the space-frequency multiplexing quantum dense coding communication is also demonstrated by using the entanglement resource. It shows the great supe-riority of high-dimensional entanglement in implementing the high-capacity quantum task. Apart from an in-creased channel capacity, it is possible to conduct deterministic high-dimensional quantum protocols, quantum imaging, and especially quantum computing. (c) 2022 Chinese Laser Press
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