Quantum photonics is a research field at the intersection of quantum mechanics and photonics that focuses on the study, control, and application of light at the quantum level, particularly its quantum properties and interactions. It investigates how to generate, manipulate, and detect individual photons or entangled states of light for use in quantum information processing, secure communication, quantum computation, and advanced sensing, leveraging phenomena such as superposition and entanglement to enable capabilities beyond classical limits.