Rydberg Atoms Enabled Miniaturization of Quantum State OAM On-Off Keying System

The OAM quantum properties of photons, especially microwave photons, have been extremely attractive for researches. However, the research on the quantum properties of microwave photons has been limited due to the use of superconducting or cryogenic environments. To address this problem, the use of Rydberg Atoms, which can operate at room temperature and pressure, has been proposed as our solution in this paper. Furthermore, we propose an OAM keying encoding method for microwave quantum with the utilization of Rydberg atom detection. The proposed system exhibits excellent noise immunity, which is a crucial factor in maintaining reliable performance. The potential consequence of this advancement is the ability to minimize the size of the quantum characterization device for microwave photons, which may enable it to fit within a compact box.