Two-step hyperentanglement purification with the quantum-state-joining method
By Bao-Cang Ren, Fangfang Du, Fuguo Deng. 2014
152 citations recorded by the source corpus.
Hyperentanglement is a promising resource in quantum information processing, especially for increasing the channel capacity of long-distance quantum communication. Hyperentanglement purification is an important method to obtain high-fidelity nonlocal hyperentangled states from mixed hyperentangled states in a long-distance quantum communication process with noisy channels. Here, we present a two-step hyperentanglement purification protocol for nonlocal mixed hyperentangled states with polarization bit-flip errors and spatial-mode phase-flip errors, resorting to polarization-spatial phase-check quantum nondemolition detectors and the quantum-state-joining method (QSJM). With QSJM, the protocol can preserve the states that are discarded in the previous hyperentanglement purification protocols. It has the advantage of a high efficiency, and it is useful for improving the entanglement of photon systems with several degrees of freedom in long-distance high-capacity quantum communication.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/a75c126aadb9fef957e2f88b70569ac2da9fddfd
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- One-step quantum secure direct communication. (2021, methodology): “We can use the hyperentanglement purification to distill the high quality hyperentangled states in both polarization and spatial-mode DOFs [68,69].”