Merge branch 'Qiskit:main' into mid-circ-meas

Author: 1ucian0

crates/circuit/src/parameter_expression.rs

@@ -21,6 +21,7 @@ use num_complex::Complex64;
 use std::collections::hash_map::DefaultHasher;
 use std::fmt;
 use std::hash::{Hash, Hasher};
+use std::sync::Arc;
 
 use pyo3::prelude::*;
 use pyo3::IntoPyObjectExt;
@@ -84,7 +85,7 @@ impl ParameterExpression {
             .replace("__end_sympy_replace__", "$");
 
         ParameterExpression {
-            expr: SymbolExpr::Symbol(Box::new(name)),
+            expr: SymbolExpr::Symbol(Arc::new(name)),
         }
     }