Indistinguishability and the external correlation of mixtures

Details Indistinguishability and the external correlation of mixtures Indistinguishability and the external correlation of mixtures

2003-08-28

arxiv.org/abs/quant-ph/0308160v2

Physics

Quantum Physics

13pp. Replaces quant-ph/0110052 v2: Numerous small edits. Thm 6 proof improved. Main reason for post: My working e-mail addres

Scientific paper

Experimental evidence, the heuristics of indistinguishability, and its logical inconsistency with quantum formalism all argue against the existence of a quantum mixture uncorrelated with the exterior, that is, argue for the postulate "The state of a system uncorrelated with its exterior is pure." This is shown to be equivalent with "The state of a system describable in terms of indistinguishable pure states is pure," and with "The state of the universe is pure"; further, it yields a quantitative expression of the traditional relation of welcher Weg information to partial coherence. It is concluded that all mixtures are "improper," the trace-reduction of a composite system's pure state.

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