Struct VariationalQuantumEigensolver

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pub struct VariationalQuantumEigensolver {
    pub hamiltonian: Array2<Complex<f64>>,
    pub ansatz: VariationalCircuit,
    pub energy_history: Vec<f64>,
    pub gradient_history: Vec<Vec<f64>>,
    pub tolerance: f64,
    pub max_iterations: usize,
    /* private fields */
}

Expand description

Variational Quantum Eigensolver (VQE) with improved optimization

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§hamiltonian: Array2<Complex<f64>>

Hamiltonian to diagonalize

§ansatz: VariationalCircuit

Ansatz circuit

§energy_history: Vec<f64>

Energy history

§gradient_history: Vec<Vec<f64>>

Gradient history

§tolerance: f64

Convergence tolerance

§max_iterations: usize

Maximum iterations

Implementations§

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impl VariationalQuantumEigensolver

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pub fn new( hamiltonian: Array2<Complex<f64>>, ansatz: VariationalCircuit, learning_rate: f64, tolerance: f64, max_iterations: usize, ) -> Self

Create a new VQE instance

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pub fn optimize(&mut self) -> QuantRS2Result<f64>

Run VQE optimization to find ground state energy

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pub fn get_optimal_parameters(&self) -> FxHashMap<String, f64>

Get the optimized parameters

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pub fn get_ground_state(&self) -> QuantRS2Result<Array1<Complex<f64>>>

Get the final ground state

Trait Implementations§

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impl Clone for VariationalQuantumEigensolver

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fn clone(&self) -> VariationalQuantumEigensolver

Returns a duplicate of the value. Read more

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for VariationalQuantumEigensolver

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl !UnwindSafe for VariationalQuantumEigensolver

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)

Performs copy-assignment from self to dest. Read more

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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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