The phase-space formulation is a formulation of quantum mechanics that places the position and momentum variables on equal footing in phase space. The two key features of the phase-space formulation are that the quantum state is described by a quasiprobability distribution (instead of a wave function, state vector, or density matrix) and operator multiplication is replaced by a star product.
The phase-space formulation is a formulation of quantum mechanics that places the position and momentum variables on equal footing in phase space. The two key features of the phase-space formulation are that the quantum state is described by a quasiprobability distribution (instead of a wave function, state vector, or density matrix) and operator multiplication is replaced by a star product.
Source: Wikipedia "Phase-space formulation" · CC BY-SA 4.0
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