quantrs2_ml/torchquantum/gates/two_qubit/special/
tqcy_traits.rs1use crate::error::{MLError, Result};
14use crate::torchquantum::{
15 CType, NParamsEnum, OpHistoryEntry, TQDevice, TQModule, TQOperator, TQParameter, WiresEnum,
16};
17use scirs2_core::ndarray::{Array2, ArrayD, IxDyn};
18
19use super::types::TQCY;
20
21impl Default for TQCY {
22 fn default() -> Self {
23 Self::new()
24 }
25}
26
27impl TQModule for TQCY {
28 fn forward(&mut self, _qdev: &mut TQDevice) -> Result<()> {
29 Err(MLError::InvalidConfiguration(
30 "Use apply() instead of forward() for operators".to_string(),
31 ))
32 }
33 fn parameters(&self) -> Vec<TQParameter> {
34 Vec::new()
35 }
36 fn n_wires(&self) -> Option<usize> {
37 Some(2)
38 }
39 fn set_n_wires(&mut self, _n_wires: usize) {}
40 fn is_static_mode(&self) -> bool {
41 self.static_mode
42 }
43 fn static_on(&mut self) {
44 self.static_mode = true;
45 }
46 fn static_off(&mut self) {
47 self.static_mode = false;
48 }
49 fn name(&self) -> &str {
50 "CY"
51 }
52}
53
54impl TQOperator for TQCY {
55 fn num_wires(&self) -> WiresEnum {
56 WiresEnum::Fixed(2)
57 }
58 fn num_params(&self) -> NParamsEnum {
59 NParamsEnum::Fixed(0)
60 }
61 fn get_matrix(&self, _params: Option<&[f64]>) -> Array2<CType> {
62 let (i_val, neg_i_val) = if self.inverse {
63 (CType::new(0.0, -1.0), CType::new(0.0, 1.0))
64 } else {
65 (CType::new(0.0, 1.0), CType::new(0.0, -1.0))
66 };
67 Array2::from_shape_vec(
68 (4, 4),
69 vec![
70 CType::new(1.0, 0.0),
71 CType::new(0.0, 0.0),
72 CType::new(0.0, 0.0),
73 CType::new(0.0, 0.0),
74 CType::new(0.0, 0.0),
75 CType::new(1.0, 0.0),
76 CType::new(0.0, 0.0),
77 CType::new(0.0, 0.0),
78 CType::new(0.0, 0.0),
79 CType::new(0.0, 0.0),
80 CType::new(0.0, 0.0),
81 neg_i_val,
82 CType::new(0.0, 0.0),
83 CType::new(0.0, 0.0),
84 i_val,
85 CType::new(0.0, 0.0),
86 ],
87 )
88 .unwrap_or_else(|_| Array2::eye(4).mapv(|x| CType::new(x, 0.0)))
89 }
90 fn apply(&mut self, qdev: &mut TQDevice, wires: &[usize]) -> Result<()> {
91 self.apply_with_params(qdev, wires, None)
92 }
93 fn apply_with_params(
94 &mut self,
95 qdev: &mut TQDevice,
96 wires: &[usize],
97 _params: Option<&[f64]>,
98 ) -> Result<()> {
99 if wires.len() < 2 {
100 return Err(MLError::InvalidConfiguration(
101 "CY gate requires exactly 2 wires".to_string(),
102 ));
103 }
104 let matrix = self.get_matrix(None);
105 qdev.apply_two_qubit_gate(wires[0], wires[1], &matrix)?;
106 if qdev.record_op {
107 qdev.record_operation(OpHistoryEntry {
108 name: "cy".to_string(),
109 wires: wires.to_vec(),
110 params: None,
111 inverse: self.inverse,
112 trainable: false,
113 });
114 }
115 Ok(())
116 }
117 fn has_params(&self) -> bool {
118 false
119 }
120 fn trainable(&self) -> bool {
121 false
122 }
123 fn inverse(&self) -> bool {
124 self.inverse
125 }
126 fn set_inverse(&mut self, inverse: bool) {
127 self.inverse = inverse;
128 }
129}