Support u3 gate application in Aer runtime API

contrib/runtime/aer_runtime.cpp

@@ -76,6 +76,13 @@ complex_t *aer_release_statevector(void *handler) {
   return sv.move_to_buffer();
 };
 
+// u3 gate
+void aer_apply_u3(void *handler, uint_t qubit, double theta, double phi,
+                  double lambda) {
+  AER::AerState *state = reinterpret_cast<AER::AerState *>(handler);
+  state->apply_u(qubit, theta, phi, lambda);
+}
+
 // phase gate
 void aer_apply_p(void *handler, uint_t qubit, double lambda) {
   AER::AerState *state = reinterpret_cast<AER::AerState *>(handler);

contrib/runtime/aer_runtime_api.h

@@ -45,6 +45,9 @@ double complex aer_amplitude(void* state, uint_t outcome);
 // returned pointer must be freed in the caller
 double complex* aer_release_statevector(void* state);
 
+// u3 gate
+void aer_apply_u3(void* state, uint_t qubit, double theta, double phi, double lambda);
+
 // phase gate
 void aer_apply_p(void* state, uint_t qubit, double lambda);
 

releasenotes/notes/support_u3_runtime_api-42f013f111c319ff.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    `aer_apply_u3` is added to `aer_runtime_api.h`