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qiskit.quantum_info.partial_trace

partial_trace(state, qargs)[소스]

Return reduced density matrix by tracing out part of quantum state.

If all subsystems are traced over this returns the trace() of the input state.

매개변수
반환값

The reduced density matrix.

반환 형식

DensityMatrix

예외

QiskitError – if input state is invalid.

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