Spectrum and separability of mixed 2-qubit X-states
classification
🪐 quant-ph
keywords
mixedx-statesfamilyqubitseparablespectrumaccordanceclasses
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The separable mixed 2-qubit X-states are classified in accordance with degeneracies in the spectrum of density matrices. It is shown that there are four classes of separable X-states, among them: one 4D family, a pair of 2D family and a single, zero-dimensional maximally mixed state.
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