qiskit.quantum_info.DensityMatrix.to_statevector¶
- DensityMatrix.to_statevector(atol=None, rtol=None)[소스]¶
Return a statevector from a pure density matrix.
- 매개변수
atol (float) – Absolute tolerance for checking operation validity.
rtol (float) – Relative tolerance for checking operation validity.
- 반환
- The pure density matrix’s corresponding statevector.
Corresponds to the eigenvector of the only non-zero eigenvalue.
- 반환 형식
- 예외 발생
QiskitError – if the state is not pure.