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Results tagged with density-operator
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user 61966
The density operator describes a quantum system in a (in general mixed) state.
2
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Degrees of freedom of a $d$ level system and the dimension of its Bloch manifold
A qubit is described by two independent degrees of freedom that parametrize the Bloch sphere.
Question:
For a level $d$ level system, i.e., a qu$d$it, what are the corresponding degrees of freedom? An …
- 2,218
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Truncated Completely Positive Trace Preserving (CPTP) maps
Let us consider the the Liouville equation of a level $N$-system with density matrix $\rho$ together with its standard properties (positive semi-definite, unit trace, etc). The evolution of the system …
- 2,218