quantrs2_sim/
optimized_simulator_simple.rs

1//! Optimized state vector simulator for quantum circuits (Simplified version)
2//!
3//! This module provides a high-performance simulator implementation focused on
4//! correctness and simplicity for quantum state vector simulation.
5
6use quantrs2_circuit::builder::{Circuit, Simulator};
7use quantrs2_core::{
8    error::{QuantRS2Error, QuantRS2Result},
9    gate::{multi, single, GateOp},
10    register::Register,
11};
12
13use crate::optimized_simple::OptimizedStateVector;
14
15/// A simplified optimized state vector simulator for quantum circuits
16#[derive(Debug, Clone)]
17pub struct OptimizedSimulatorSimple;
18
19impl OptimizedSimulatorSimple {
20    /// Create a new optimized simulator
21    pub fn new() -> Self {
22        Self
23    }
24}
25
26impl Default for OptimizedSimulatorSimple {
27    fn default() -> Self {
28        Self::new()
29    }
30}
31
32impl<const N: usize> Simulator<N> for OptimizedSimulatorSimple {
33    fn run(&self, circuit: &Circuit<N>) -> QuantRS2Result<Register<N>> {
34        // Initialize state vector
35        let mut state_vector = OptimizedStateVector::new(N);
36
37        // Apply each gate in the circuit
38        for gate in circuit.gates() {
39            match gate.name() {
40                // Single-qubit gates
41                "H" => {
42                    if let Some(g) = gate.as_any().downcast_ref::<single::Hadamard>() {
43                        let matrix = g.matrix()?;
44                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
45                    }
46                }
47                "X" => {
48                    if let Some(g) = gate.as_any().downcast_ref::<single::PauliX>() {
49                        let matrix = g.matrix()?;
50                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
51                    }
52                }
53                "Y" => {
54                    if let Some(g) = gate.as_any().downcast_ref::<single::PauliY>() {
55                        let matrix = g.matrix()?;
56                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
57                    }
58                }
59                "Z" => {
60                    if let Some(g) = gate.as_any().downcast_ref::<single::PauliZ>() {
61                        let matrix = g.matrix()?;
62                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
63                    }
64                }
65                "RX" => {
66                    if let Some(g) = gate.as_any().downcast_ref::<single::RotationX>() {
67                        let matrix = g.matrix()?;
68                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
69                    }
70                }
71                "RY" => {
72                    if let Some(g) = gate.as_any().downcast_ref::<single::RotationY>() {
73                        let matrix = g.matrix()?;
74                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
75                    }
76                }
77                "RZ" => {
78                    if let Some(g) = gate.as_any().downcast_ref::<single::RotationZ>() {
79                        let matrix = g.matrix()?;
80                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
81                    }
82                }
83                "S" => {
84                    if let Some(g) = gate.as_any().downcast_ref::<single::Phase>() {
85                        let matrix = g.matrix()?;
86                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
87                    }
88                }
89                "T" => {
90                    if let Some(g) = gate.as_any().downcast_ref::<single::T>() {
91                        let matrix = g.matrix()?;
92                        state_vector.apply_single_qubit_gate(&matrix, g.target.id() as usize);
93                    }
94                }
95
96                // Two-qubit gates
97                "CNOT" => {
98                    if let Some(g) = gate.as_any().downcast_ref::<multi::CNOT>() {
99                        state_vector.apply_cnot(g.control.id() as usize, g.target.id() as usize);
100                    }
101                }
102                "CZ" => {
103                    if let Some(g) = gate.as_any().downcast_ref::<multi::CZ>() {
104                        let matrix = g.matrix()?;
105                        state_vector.apply_two_qubit_gate(
106                            &matrix,
107                            g.control.id() as usize,
108                            g.target.id() as usize,
109                        );
110                    }
111                }
112                "SWAP" => {
113                    if let Some(g) = gate.as_any().downcast_ref::<multi::SWAP>() {
114                        let matrix = g.matrix()?;
115                        state_vector.apply_two_qubit_gate(
116                            &matrix,
117                            g.qubit1.id() as usize,
118                            g.qubit2.id() as usize,
119                        );
120                    }
121                }
122
123                // Three-qubit gates are not directly supported yet
124                "Toffoli" | "Fredkin" => {
125                    return Err(QuantRS2Error::UnsupportedOperation(
126                        format!("Direct {} gate not yet implemented in optimized simulator. Use gate decomposition.", gate.name())
127                    ));
128                }
129
130                _ => {
131                    return Err(QuantRS2Error::UnsupportedOperation(format!(
132                        "Gate {} not supported in optimized simulator",
133                        gate.name()
134                    )));
135                }
136            }
137        }
138
139        // Create register from final state
140        Register::<N>::with_amplitudes(state_vector.state().to_vec())
141    }
142}
quantrs2_sim/optimized_simulator_simple.rs

quantrs2_sim/
optimized_simulator_simple.rs
