Update index.md

CQCL · Nov 21, 2024 · 7e62b9e · 7e62b9e
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Showing 1 changed file with 2 additions and 1 deletion.
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@@ -85,7 +85,8 @@ tags: [skip-execution]
 compiled_circ = backend.get_compiled_circuit(circ)
 ```
 
-The passes applied by different levels of optimisation are specified in the table below.
+The passes applied by different levels of optimisation are specified in the table below. Note that optimisation level 0, 1 and 2 do not remove barriers from 
+a circuit, while optimisation level 3 will.
 
 :::{list-table} **Default compilation pass for the QuantinuumBackend**
 :widths: 25 25 25