In classical mechanics, the complete state of a particle is given by three components of momentum and three components of position. The phase space of a particle is a six-dimensional space, three axes for momentum and three for position, so that each point of a particle's phase space represents a complete state of the particle, and the entire phase space represents all possible states of the particle. For an N -particle system, the phase space has 6N dimensions, 6 for each particle, and a single point in the phase space represents the simultaneous complete states for each of the N particles.
See also Physics, Quantum
w. michael dickson
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