Proper and improper density matrices and the consistency of the Deutsch model for Local Closed Timelike Curves

Details Proper and improper density matrices and the consistency of the Deutsch model for Local Closed Timelike Curves Proper and improper density matrices and the consistency of the Deutsch model for Local Closed Timelike Curves

2011-10-28

arxiv.org/abs/1110.6361v3

Physics

Quantum Physics

13 pages, 1 figure

Scientific paper

We discuss the concept of proper and improper density matrixes and we argue that this issue is of fundamental importance for the understanding of the quantum-mechanical CTC model proposed by Deutsch. We arrive at the conclusion that under a realistic interpretation, the distinction between proper and improper density operators is not a relativistically covariant notion and this fact leads to the conclusion that the D-CTC model is physically inconsistent.

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