Quantum Optics

Quantum Optics is a subfield of physics that applies the principles of quantum mechanics to study the fundamental nature of light and its interaction with matter. Moving beyond the classical wave description, this field treats light as being composed of discrete, quantized particles called photons, allowing for the investigation of phenomena that have no classical counterpart, such as quantum entanglement, superposition, and the particle-like behavior of individual photons. The principles of quantum optics are foundational to the operation of lasers and are driving the development of next-generation technologies including quantum computing, quantum cryptography, and ultra-precise sensors.

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2. Quantization of the Electromagnetic Field