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Figure 12 | EPJ Quantum Technology

Figure 12

From: SpinQ Gemini: a desktop quantum computing platform for education and research

Figure 12

The unitary evolution path for the mixed state. The state vector of the initial mixed state is prepared to be along -x axis pointing to A. It evolves along the path A–B–C–D–A to return back to point to A. Ω is the solid angle enclosed by this path. \(\theta =\Omega /4\) is the angle between the xy plane and either of the half paths (A–B–C or C–D–A)

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