classical mechanics from quantum mechanics?

Dear student,

Classical mechanics is completely deterministic: Given the exact positions and velocities of all particles at a given time, along with the function, one can calculate the future (and past) positions and velocities of all particles at any other time. The evolution of the system's positions and momenta through time is often referred to as atrajectory.

Quantum mechanics is not deterministic, but probabilistic. It forces us to abandon the notion of precisely defined trajectories of particles through time and space. Instead, we must talk in terms ofprobabilitiesfor alternative system configurations.

Regards

Sumit