Physics – Quantum Physics
Scientific paper
2006-09-12
Physics
Quantum Physics
4 pages. All types of comments are welcome
Scientific paper
We study a quantum theory based on two assumptions: In the intrinsic frame of reference of an isolated, macroscopic system, (i) the system has no global motion and is not entangled with any other system, (ii) time evolution of statevectors of systems outside the system satisfy Schr\"{o}dinger equation. A process of collision-type interaction between a microscopic system and a macroscopic system is studied in an auxiliary frame of reference. In transforming the statevector of the two systems obtained in the auxiliary frame of reference to the intrinsic frame of reference of the macroscopic system, the above first assumption requires a discontinuous change of the statevector. A probabilistic interpretation is given to the statevector for the discontinuous change. For the microscopic system, the density matrix given in the theory here is equal to the reduced density matrix given in the usual quantum mechanics.
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