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A quantum state is the state of a quantum system, fully describing the probabilities of the outcomes of measurements on the system. Quantum teleportation transfers this state from one particle to another.

Entanglement is a quantum phenomenon where two or more particles become connected in such a way that the state of one instantly influences the state of the other, regardless of the distance between them.

A quantum channel is a communicative link used to transfer quantum information between two parties, utilizing properties of quantum mechanics, such as superposition and entanglement.

Quantum teleportation is a process by which the quantum state of an object is transferred from one location to another, without the physical transfer of the object itself. It uses entanglement and classical communication.

Quantum information is information that is held in the state of a quantum system. Unlike classical information, it may exist in superpositions and exhibit entanglement, which are used in processes like quantum teleportation.

A Bell state measurement is a quantum measurement process that determines which of the four entangled Bell states two qubits are in. This measurement step is crucial in the quantum teleportation protocol.

Classical communication refers to the transfer of information using classical systems. In quantum teleportation, classical communication is used alongside entanglement to complete the teleportation protocol.