0.29.1

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qiskit.quantum_info.StabilizerState.trace¶

StabilizerState.trace()[source]¶

Return the trace of the stabilizer state as a density matrix, which equals to 1, since it is always a pure state.

Returns: the trace (should equal 1).
Return type: double
Raises: QiskitError – if input is not a StabilizerState.