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Probability distributions consistent with a mixed state | | M. A. Nielsen
; | | Date: |
6 Sep 1999 | | Journal: | Physical Review A 61 (6): Art. No. 064301 (2000) | | Subject: | quant-ph | | Abstract: | A density matrix $
ho$ may be represented in many different ways as a mixture of pure states, $
ho = sum_i p_i |psi_i
a la psi_i|$. This paper characterizes the class of probability distributions $(p_i)$ that may appear in such a decomposition, for a fixed density matrix $
ho$. Several illustrative applications of this result to quantum mechanics and quantum information theory are given. | | Source: | arXiv, quant-ph/9909020 | | Services: | Forum | Review | PDF | Favorites | |
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