The results open new pathways for constructing scalable and complex quantum systems using high-dimensional entanglement.
In a study published in Physical Review Letters, the team led by academician GUO Guangcan from University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) made progress in high dimensional quantum teleportation. The researchers demonstrated the teleportation of high-dimensional states in a three-dimensional six-photon system.
To transmit unknown quantum states from one location to another, quantum teleportation is one of the key technologies to realize the long-distance transmission.
Compared with two-dimensional system, high-dimensional system quantum networks have the advantages of higher channel capacity and better security. In recent years more and more researchers of the quantum information field have been working on generating efficient generation of high-dimensional quantum teleportation to achieve efficient high-dimensional quantum networks.
As early as 2016, the researchers from USTC experimentally showed that nonlocality can be produced from single-particle contextuality through two-particle correlations which do not violate any Bell inequality by themselves, and generated high-fidelity three-dimensional entanglement. In 2020, 32-dimensional quantum entanglement and efficient distribution of high-dimensional entanglement through 11 km fiber were respectively achieved to lay a solid foundation for scalable quantum networks.
Achieving High-Fidelity Teleportation via Spatial Modes
In a linear optical system, auxiliary entanglement is the key to realizing high-dimensional quantum teleportation. The researchers exploited the spatial mode (path) to encode the three-dimensional states that has been demonstrated to be extremely high-fidelity, and used an auxiliary entangled photon pair to perform the high-dimensional Bell state measurement (HDBSM), demonstrating the teleportation of a three-dimensional quantum state using the spatial mode of a single photon.
In this work, the fidelity of teleportation process matrix could reach 0.5967, which is seven standard deviations above the fidelity of 1/3, which proves the teleportation is both non-classical and genuine three-dimensional.
This study paves the way to rebuild complex quantum systems remotely and to construct complex quantum networks. It will promote the research on high-dimensional quantum information tasks. Entanglement-assisted methods for HDBSM are feasible for other high-dimensional quantum information tasks.
Reference: “Experimental High-Dimensional Quantum Teleportation” by Xiao-Min Hu, Chao Zhang, Bi-Heng Liu, Yu Cai, Xiang-Jun Ye, Yu Guo, Wen-Bo Xing, Cen-Xiao Huang, Yun-Feng Huang, Chuan-Feng Li and Guang-Can Guo, 2 December 2020, Physical Review Letters.
DOI: 10.1103/PhysRevLett.125.230501
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7 Comments
Wow, this article probably goes right over the top of most people’s heads, but it may have a tremendous impact on our future. Next thing you know, the Chinese will be directly teleporting He3 directly to earth. 🙂
Scientists from Poland have the technology of constant coherent quantum entanglement !!!
https://pubs.acs.org/doi/full/10.1021/acsomega.0c05199
… but AA said that is not possible!
Lots of tech-speak, w/o genuine explanation for lay persons. This article doesn’t put the implications of this breakthrough into any concrete, practical terms non-scientists can relate to.
Valley&Bay got that exactly correct. ABD in the social sciences, but after reading the article my only response was “What?” Great article, I am sure, written for the couple 100 or 1000 people who have the specific knowledge to understand the terminology & scientific ramifications of the research, but almost useless to the rest of humanity. I kept looking for the “So what this all means is…” paragraph, but one never came.
… So!
What would happened if you could have two entangled electrons and you kick one into a black whole?
Could one observe via one outside of the black whole, and could one that is inside a black whole tunnel outside?
…
“Spooky Action At A Distance”…still ‘pounding an imaginary nail with an imaginary hammer’.
(The ‘Copenhagen/Bonn’ adherents will believe anything if ‘the numbers say so’ and if the numbers don’t ‘add-up’ the way they want them to…the ‘Experiment’ is changed until they do)