Non-classical light

Non-classical light refers to light that exhibits quantum properties not found in everyday light sources like lamps or the sun. Unlike classical light, which behaves predictably, non-classical light can display phenomena such as entanglement, squeezing, or reduced noise in certain measurements. These properties arise from the quantum nature of light particles, photons. Non-classical light is essential for advanced technologies like quantum computing, quantum cryptography, and highly sensitive measurements, enabling capabilities beyond what classical physics allows. It represents a realm where the rules of classical physics give way to the unique behaviors of quantum mechanics.