:term:`QC_TYPE <QC_TYPE (DCFT)>`
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      Controls the type of the quadratically-convergent algorithm (effective for ALGORITHM = QC). If set to TWOSTEP the Newton-Raphson equations are only solved for the orbital updates, the cumulant is updated using the standard Jacobi algorithm. If set to SIMULTANEOUS both cumulant and orbitals are updated in a single Newton-Raphson step.

      * **Type**: string
      * **Possible Values**: TWOSTEP, SIMULTANEOUS
      * **Default**: SIMULTANEOUS

