qiskit/releasenotes/notes/0.21/time-evo-framework-9d58827b...

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Interfaces for the unified framework for Quantum Time Evolution are introduced.
:class:`~qiskit.algorithms.EvolutionProblem` defines an evolution problem and
can be passed to any evolution algorithm available in the framework.
:class:`~qiskit.algorithms.ImaginaryEvolver` and
:class:`~qiskit.algorithms.RealEvolver` are interfaces for
imaginary- and real-time evolution cases respectively. They serve as a base for any time
evolution algorithm for evolving quantum states, including evolutions based on
time-dependent Hamiltonians.
:class:`~qiskit.algorithms.EvolutionResult` is introduced as a result object
for quantum time evolution algorithms.