Physics-Informed Discrete-Event Simulation of Polarization-Encoded Quantum Networks

Researchers have developed a physics-informed discrete-event simulation framework for polarization-encoded quantum networks, building upon the SeQUeNCe simulator. This extension incorporates Jones-calculus optical components, such as spontaneous parametric down-conversion (SPDC) Bell-state sources, wave plates, and polarizing beam splitters, to model the behavior of photonic quantum systems. The framework also accounts for various fiber impairments, including polarization mode dispersion, chromatic dispersion, and Raman noise¹. By integrating these physics-based models, the simulator can accurately capture the complex dynamics of quantum networks. This advancement has significant implications for the development and security of quantum communication systems, particularly in the context of state-aligned threat activity, where the stakes extend beyond the immediate target to the geopolitical realm. The ability to simulate and analyze quantum networks in a more realistic and detailed manner can inform strategies for mitigating potential threats and protecting sensitive information.