A Fock state (also known as a number state), in quantum mechanics, is any element of a Fock space with a well-defined number of particles (or quanta). These states are named after the Soviet physicist, V. A. Fock.
Read more about Fock State: Definition, Energy Eigenstates, Vacuum Fluctuations, Multi-mode Fock States, Source of Single Photon State, Non-classical Behaviour
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