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quantumlib · Nov 12, 2024 · 30ab20b · 30ab20b
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commit 30ab20b
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diff --git a/qualtran/bloqs/phase_estimation/qubitization_qpe_test.py b/qualtran/bloqs/phase_estimation/qubitization_qpe_test.py
@@ -74,6 +74,9 @@ def test_qubitization_phase_estimation_of_walk(num_terms: int, use_resource_stat
     )
     qpe_bloq = QubitizationQPE(walk, state_prep)
 
+    # TODO cirq simulation seems to fail for controlled `QubitizationWalkOperator`.
+    #      the following code decomposes a few levels till it gets only simulable bloqs.
+    #      https://github.com/quantumlib/Qualtran/issues/1495
     def should_decompose(binst):
         from qualtran import Adjoint, Controlled
         from qualtran.bloqs.basic_gates import Power

diff --git a/qualtran/bloqs/phase_estimation/text_book_qpe_test.py b/qualtran/bloqs/phase_estimation/text_book_qpe_test.py
@@ -68,6 +68,9 @@ def test_textbook_phase_estimation_qubitized_walk(num_terms: int, use_resource_s
     # 1. Construct QPE bloq
     qpe_bloq = TextbookQPE(walk, ctrl_state_prep=state_prep)
 
+    # TODO cirq simulation seems to fail for controlled `QubitizationWalkOperator`.
+    #      the following code decomposes a few levels till it gets only simulable bloqs.
+    #      https://github.com/quantumlib/Qualtran/issues/1495
     def should_decompose(binst):
         from qualtran import Adjoint, Controlled
         from qualtran.bloqs.basic_gates import Power