QuantumApproximateOptimization

oxirs_embed::quantum_circuits

Struct QuantumApproximateOptimization 

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pub struct QuantumApproximateOptimization {
    pub num_qubits: usize,
    pub depth: usize,
    pub cost_hamiltonian: Vec<(f64, Vec<(usize, char)>)>,
    pub mixer_hamiltonian: Vec<(f64, Vec<(usize, char)>)>,
    pub beta_params: Vec<f64>,
    pub gamma_params: Vec<f64>,
    pub cost_history: Vec<f64>,
}
Expand description

Quantum Approximate Optimization Algorithm (QAOA) implementation

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§num_qubits: usize

Number of qubits

§depth: usize

QAOA depth (p layers)

§cost_hamiltonian: Vec<(f64, Vec<(usize, char)>)>

Cost Hamiltonian

§mixer_hamiltonian: Vec<(f64, Vec<(usize, char)>)>

Mixer Hamiltonian (usually X gates)

§beta_params: Vec<f64>

Beta parameters (mixer angles)

§gamma_params: Vec<f64>

Gamma parameters (cost angles)

§cost_history: Vec<f64>

Optimization history

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impl QuantumApproximateOptimization

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pub fn new(num_qubits: usize, depth: usize) -> Self

Create new QAOA instance

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pub fn add_cost_term( &mut self, coefficient: f64, pauli_string: Vec<(usize, char)>, )

Add cost term (typically ZZ interactions for MaxCut)

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pub fn build_circuit(&self) -> QuantumCircuit

Build QAOA circuit

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pub fn compute_cost(&self) -> Result<f64>

Compute cost function expectation

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pub fn optimize( &mut self, max_iterations: usize, learning_rate: f64, ) -> Result<f64>

Optimize QAOA parameters

Trait Implementations§

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impl Clone for QuantumApproximateOptimization

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fn clone(&self) -> QuantumApproximateOptimization

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 QuantumApproximateOptimization

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

Formats the value using the given formatter. Read more

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