In a study published in Physical review letters, the team led by academician GUO Guangcan from China University of Science and Technology (USTC) of the Chinese Academy of Sciences (CAS) made progress in high-dimensional quantum teleportation. The researchers demonstrated the teleportation of high-dimensional states to a six-dimensional three-dimensional photon system.
To transmit unknown quantum states from one place to another, quantum teleportation is one of the key technologies to realize long distance transmission.
Compared to the 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 in the field of quantum information have been working on generating efficient high-dimensional quantum teleportation to achieve efficient high-dimensional quantum networks.
As early as 2016, researchers from the USTC experimentally showed that invalidity can be produced by one-particle contextuality through two-particle correlations which do not violate any Bell inequality by itself, and created a three-dimensional confusion of high reliability. In 2020, 32-dimensional quantum entanglements and the efficient distribution of high dimensional entanglements through 11 km fibers were achieved respectively to lay a solid foundation for scalable quantum networks.
In a linear optical system, auxiliary interference is the key to realizing high-dimensional quantum teleportation. The researchers used the spatial mode (path) to encode three-dimensional states that has been demonstrated in extremely high fidelity and used an entangled auxiliary photon pair to perform the Bell state high-dimensional (HDBSM) measurement, demonstrating the teleportation of a three-dimensional quantum state using the spatial mode of a single photon.
In this work, the fidelity of the teleportation process matrix can reach 0.5967, which is seven standard deviations on the reliability of 1/3, which proves that teleportation is non-classical and true three dimensional.
This study paves the way for reconstructing complex quantum systems at a distance and constructing complex quantum networks. It will promote research on high-dimensional quantum information tasks. Configuration-assisted methods for HDBSM are possible for other high-dimensional quantum information tasks.
Reference: “High Dimension Quantum Experimental 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, December 2, 2020, Physical review letters.
DOI: 10.1103 / PhysRevLett.125.230501