| 31. | One can view " ? " ? as a density matrix, and therefore the state dual to ?.
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| 32. | The compression can be described as a sort operation on the diagonal entries of the density matrix which describes the system.
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| 33. | However, the general form of the compression operation is a sort operation on the diagonal entries of the density matrix.
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| 34. | However, in contrast to Lindblad equations, Redfield equations do not guarantee a positive time evolution of the density matrix.
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| 35. | Let ? be a density matrix acting on a Hilbert space H _ A of finite dimension " n ".
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| 36. | In 1981, Bohm and Hiley introduced the " characteristic matrix ", a non-Hermitian extension of the density matrix.
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| 37. | HEOMs are developed to describe the time evolution of the density matrix \ rho ( t ) for an open quantum system.
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| 38. | The Renyi entropy in quantum physics is not considered to be an observable, due to its nonlinear dependence on the density matrix.
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| 39. | Bayesian methods as well as Maximum likelihood estimation of the density matrix can be used to restrict the operators to valid physical results.
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| 40. | In quantum statistical mechanics, the ensemble is a probability distribution over pure states, and can be compactly summarized as a density matrix.
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