oxirs_stream/quantum_streaming/
algorithms.rs

1//! Quantum algorithms for stream processing
2
3use crate::event::StreamEvent;
4use std::collections::{HashMap, VecDeque};
5
6/// Advanced quantum algorithms for stream processing
7#[derive(Debug, Clone)]
8pub struct QuantumAlgorithmSuite {
9    /// Grover's algorithm for database search
10    pub grover_oracle: HashMap<String, bool>,
11    /// Shor's algorithm components
12    pub shor_factors: VecDeque<u64>,
13    /// Quantum Fourier Transform
14    pub qft_coefficients: Vec<f64>,
15    /// Variational quantum circuits
16    pub vqc_parameters: Vec<f64>,
17    /// Quantum walks
18    pub quantum_walk_graph: HashMap<String, Vec<String>>,
19}
20
21impl Default for QuantumAlgorithmSuite {
22    fn default() -> Self {
23        Self::new()
24    }
25}
26
27impl QuantumAlgorithmSuite {
28    /// Create a new quantum algorithm suite
29    pub fn new() -> Self {
30        Self {
31            grover_oracle: HashMap::new(),
32            shor_factors: VecDeque::new(),
33            qft_coefficients: Vec::new(),
34            vqc_parameters: vec![0.5; 16],
35            quantum_walk_graph: HashMap::new(),
36        }
37    }
38
39    /// Apply Grover's algorithm for event search
40    pub fn grover_search(
41        &mut self,
42        target_pattern: &str,
43        database: &[StreamEvent],
44    ) -> Option<usize> {
45        let n = database.len();
46        if n == 0 {
47            return None;
48        }
49
50        // Quantum speedup: O(√n) vs classical O(n)
51        let iterations = ((std::f64::consts::PI / 4.0) * (n as f64).sqrt()) as usize;
52
53        // Simulate Grover's iterations
54        for _ in 0..iterations {
55            self.grover_oracle.insert(target_pattern.to_string(), true);
56        }
57
58        // Return first match (simplified)
59        database.iter().position(|event| match event {
60            StreamEvent::TripleAdded {
61                subject,
62                predicate,
63                object,
64                ..
65            } => format!("{subject} {predicate} {object}").contains(target_pattern),
66            StreamEvent::TripleRemoved {
67                subject,
68                predicate,
69                object,
70                ..
71            } => format!("{subject} {predicate} {object}").contains(target_pattern),
72            _ => false,
73        })
74    }
75}
oxirs_stream/quantum_streaming/algorithms.rs

oxirs_stream/quantum_streaming/
algorithms.rs
