Resolving issue related to QuantumOpticsBase. (#49)

Hamiltonian-Action · web-flow · commit 3773c03ecd43 · 2025-04-19T21:48:11.000-04:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,7 +1,8 @@
 # News
 
-## v0.3.9 - 2025-04-03
+## v0.3.9 - 2025-04-20
 
+- Improvements to implementation of `entropy_vn`.
 - Deprecate `equal_bases`.
 - Add `GabsRepr` type for representations in Gabs.
 
diff --git a/src/metrics.jl b/src/metrics.jl
@@ -10,7 +10,8 @@ wherein it is understood that ``0 \\log(0) \\equiv 0``.
 Consult specific implementation for function arguments and logarithmic basis.
 """
 function entropy_vn end
-
+# avoids causing a breaking change in QuantumOpticsBase.jl
+entropy_vn(::StateVector; kwargs...) = 0
 """
 Calculate the joint fidelity of two density operators, defined as
 
