A "Quantum Wave" refers to the wave-like behavior of particles at the quantum level, as described by quantum mechanics. In this framework, particles such as electrons and photons can exhibit both particle-like and wave-like properties, leading to phenomena like interference and superposition. This duality is fundamental to understanding how matter and energy interact at microscopic scales. The concept is often illustrated through the double-slit experiment, where particles create an interference pattern when not observed, suggesting they exist in multiple states simultaneously. This behavior challenges classical physics and has implications for technologies like quantum computing and quantum cryptography.