SciPyImaginaryEvolver

class SciPyImaginaryEvolver(num_timesteps)

Bases: ImaginaryTimeEvolver

Classical Evolver for imaginary time evolution.

Evolves an initial state $|\mathrm{\Psi }⟩$ for an imaginary time $\tau =it$ under a Hamiltonian $H$, as provided in the evolution_problem. Note that the precision of the evolver does not depend on the number of timesteps taken.

Parameters:

num_timesteps (int) – The number of timesteps in the simulation.

Raises:

ValueError – If num_timesteps is not a positive integer.

Methods

evolve(evolution_problem)

Perform imaginary time evolution $\exp (-\tau H)|\mathrm{\Psi }⟩$.

Evolves an initial state $|\mathrm{\Psi }⟩$ for an imaginary time $\tau$ under a Hamiltonian $H$, as provided in the evolution_problem.

Parameters:

evolution_problem (TimeEvolutionProblem) – The definition of the evolution problem.

Returns:

Evolution result which includes an evolved quantum state.

Return type:

TimeEvolutionResult