| 1. | Is sometimes called the reduced density matrix of on subsystem.
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| 2. | The density matrix is also a crucial tool in quantum decoherence theory.
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| 3. | Where \ rho \, is the density matrix of the state.
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| 4. | These methods have been incorporated into grid-based density matrix propagation methods.
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| 5. | When, etc . are the reduced density matrices of a density matrix.
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| 6. | It can be shown that the following density matrix
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| 7. | A density matrix is by definition positive semidefinite.
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| 8. | Novikov's rule applied to the density matrix itself gives the Deutsch prescription.
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| 9. | Colloquially, we " trace out " system to obtain the reduced density matrix on.
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| 10. | The density matrix of a "'thermal state "'is given by
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