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qiskit.algorithms.time_evolvers.variational.ImaginaryVariationalPrinciple(qgt, gradient) GitHub(opens in a new tab)

Bases: VariationalPrinciple, ABC(opens in a new tab)

Abstract class for an Imaginary Variational Principle. The imaginary variant means that we consider imaginary time dynamics.


  • qgt (BaseQGT) – Instance of a class used to compute the GQT.
  • gradient (BaseEstimatorGradient) – Instance of a class used to compute the state gradient.
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