Chinese Academy of Sciences research on Large Quantum Storage obtain new progress

Recently, the Chinese Academy of Sciences, Chinese Academy of Sciences Key Laboratory of Quantum Information Professor Shi Baosen group in quantum storage research made a series of important progress to achieve the two storage units between the high-dimensional entanglement and multi-degree of freedom of the super-entanglement, the research results recently published in the "light : Science and Application "and" Nature - Communication ".
    
Quantum entanglement is the core of long-distance quantum communication and scalable linear quantum computation. Quantum entanglement storage is one of the key technologies to realize quantum computation and quantum network communication. In order to construct a quantum network with large amount of information and long distance, the first problem to be solved is the quantum storage of high-dimensional entanglement. erj3ekf2743v
    
More recently, the Shbobsen group, through the imaging system, has stored the single photon entangled with the first cold atom system into the second atomic system and proved that there exists a seven-dimensional Orbital angular momentum entanglement.
    
As a quantum information carrier, photons can be entangled between a single degree of freedom such as polarization, path and space mode, and entanglement can be realized at the same time in a plurality of degrees of freedom, and so-called super entanglement is generated. Can be more effective measurement of the Bell state, the construction of asymmetric optical quantum network, improve the quantum capacity of the channel network can also contribute to the physical realization of quantum computing and so on. 7201k2zge
    
Using interferometry, the researchers generated photons with entanglement of two degrees of freedom of path and orbital angular momentum integrated with the first atomic system, and then sent the single photon to a second cold atomic ensemble, using another interferometer So that two degrees of freedom of path and orbital angular momentum are established between two atomic ensembles.