👉 In quantum mechanics, a ket is an operator that represents a state of a quantum system. A ket can be represented as a matrix, specifically a density matrix, where each element in the matrix corresponds to a probability amplitude for a particular eigenvalue of the system's Hamiltonian. The term "ketogenetic" refers to the idea that ket operators are akin to molecules in chemistry, acting upon a molecule's state and producing its quantum properties. This concept is fundamental in quantum information theory, where it