Many physicists and engineers have been working on developing highly efficient quantum technologies that can perform similar functions to conventional electronics by leveraging quantum mechanical effects. This includes the creation of high-dimensional quantum memories, which are storage devices with greater information capacity and noise resilience compared to two-dimensional quantum memories.
“Our group has been utilizing the orbital angular momentum mode in the space channel to investigate high-dimensional quantum storage and has gained extensive research experience and technology,” said Dong Sheng Ding, co-author of the paper, in an interview with Phys.org. “Achieving high-dimensional and high-efficiency quantum storage has always been our objective.”
In their previous studies, Ding and his colleagues discovered that the unique properties of a spatial pattern called the perfect vortex optical field could be highly advantageous for the development of high-dimensional quantum memories. This inspired them to utilize the mode-independent interaction between light and matter associated with this pattern to achieve high-dimensional and efficient quantum storage.
“The fundamental principle of our storage device is based on the phenomenon of electromagnetic induced transparency, which is the interaction between light and matter,” explained Ding. “In simple terms, the signal photons are slowed down to zero velocity in the medium and stored for a certain period of time. Then, the stored information of the signal photons can be retrieved using the control light.”
The quantum system created by the researchers consists of signal photons, a control light beam, a Rubidium cold atomic ensemble serving as the storage medium, and a spatial light modulator that encodes and decodes high-dimensional quantum information. The team’s memory encodes high-dimensional information on the signal photons, ultimately achieving high-dimensional storage of information in the medium.
2024-01-15 18:41:03
Source from phys.org rnrn
