3 files changed, 37 insertions, 2 deletions
diff --git a/libpsi-core/src/core/circuit.rs b/libpsi-core/src/core/circuit.rs
index 65e359a..43f51d0 100644
--- a/libpsi-core/src/core/circuit.rs
+++ b/libpsi-core/src/core/circuit.rs
@@ -2,8 +2,8 @@ use super::{ClassicalRegister, QuantumBit, QuantumGate};
 
 #[allow(dead_code)]
 struct QuantumCircuitInstruction {
-    target_indices: Vec<i32>,
-    control_indices: Vec<i32>,
+    target_indices: Vec<usize>,
+    control_indices: Vec<usize>,
     gate: QuantumGate,
 }
 
@@ -22,4 +22,12 @@ impl QuantumCircuit {
             instructions: Vec::new(),
         }
     }
+
+    pub fn apply(&mut self, gate: &QuantumGate, control_bits: &[usize], target_bits: &[usize]) {
+        self.instructions.push(QuantumCircuitInstruction {
+            gate: gate.clone(),
+            target_indices: target_bits.to_vec(),
+            control_indices: control_bits.to_vec(),
+        });
+    }
 }
diff --git a/libpsi-core/src/core/mod.rs b/libpsi-core/src/core/mod.rs
index 2f42682..e8e2a4b 100644
--- a/libpsi-core/src/core/mod.rs
+++ b/libpsi-core/src/core/mod.rs
@@ -1,7 +1,9 @@
 pub mod circuit;
 pub mod component;
 pub mod gates;
+pub mod runtime;
 
 pub use circuit::*;
 pub use component::*;
 pub use gates::*;
+pub use runtime::*;
diff --git a/libpsi-core/src/core/runtime.rs b/libpsi-core/src/core/runtime.rs
new file mode 100644
index 0000000..f699d54
--- /dev/null
+++ b/libpsi-core/src/core/runtime.rs
@@ -0,0 +1,25 @@
+use super::{ClassicalRegister, QuantumBit, QuantumCircuit};
+
+#[allow(unused)]
+pub struct ExecutationData {
+    quantum_states: Vec<QuantumBit>,
+    classical_states: ClassicalRegister,
+}
+
+impl ExecutationData {
+    pub fn new(quantum_states: Vec<QuantumBit>, classical_states: ClassicalRegister) -> Self {
+        ExecutationData {
+            quantum_states,
+            classical_states,
+        }
+    }
+}
+
+pub trait RuntimeBase {
+    fn get_circuit(&self) -> &QuantumCircuit;
+}
+
+pub trait Runtime<T: RuntimeBase = Self> {
+    fn new(circuit: QuantumCircuit) -> Self;
+    fn execute(&self, repeat: usize) -> Vec<ExecutationData>;
+}