Can the Bloch sphere be generalized to two qubits?
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The Bloch sphere is a nice visualization of single qubit states. Mathematically, it can be generalized to any number of qubits by means of a high-dimensional hypersphere. But such things are not easy to visualize. What attempts have been made to extend visualizations based on the Bloch sphere to two qubits?
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edited yesterday
Peter Mortensen
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James Wootton
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