Struct QuantumState 

pub struct QuantumState {
    pub amplitudes: Vec<Complex64>,
    pub n_qubits: usize,
}

Represents a quantum state as a complex vector in Hilbert space

Fields

amplitudes: Vec<Complex64>

State vector |ψ⟩ with 2^n complex amplitudes

n_qubits: usize

Number of qubits

Implementations

impl QuantumState

pub fn new(n_qubits: usize) -> Self

Create a new quantum state initialized to |00…0⟩

pub fn superposition(n_qubits: usize) -> Self

Create equal superposition state |+⟩^⊗n

pub fn apply_single_qubit_gate( &mut self, gate: [[Complex64; 2]; 2], qubit: usize, )

Apply single-qubit gate to a specific qubit

pub fn hadamard(&mut self, qubit: usize)

Apply Hadamard gate to create superposition

pub fn pauli_x(&mut self, qubit: usize)

Apply Pauli X (NOT) gate

pub fn pauli_z(&mut self, qubit: usize)

Apply Pauli Z gate

pub fn cnot(&mut self, control: usize, target: usize)

Apply CNOT gate between control and target qubits

pub fn measure(&mut self, qubit: usize, rng: &mut impl Rng) -> bool

Measure a qubit and collapse the state

pub fn measure_all(&mut self, rng: &mut impl Rng) -> u32

Measure all qubits and return the classical state

pub fn entanglement_entropy(&self, partition_size: usize) -> f64

Calculate von Neumann entropy for entanglement

pub fn bell_state(bell_type: u8) -> Self

Create Bell state |Φ+⟩ = (|00⟩ + |11⟩)/√2

pub fn teleport(input_state: &QuantumState, rng: &mut impl Rng) -> (u8, f64)

Apply quantum teleportation protocol