Issues

• [Bug]: ParallelGate accepts non-integer num_copies, producing an invalid gate

  kind/bug-reporttriage/discuss
  quantumlib/Cirq#8398 · Filter by author NiranjanRSoorej06 opened on Oct 1, 2026
  1

• [Bug]: MappingManager.shortest_path raises unhandled KeyError on unreachable qubits and returns empty list for self-paths

  kind/bug-reporttriage/accepted
  quantumlib/Cirq#8380 · Filter by author SteveSonyJacob opened on Sep 25, 2026
  2

  

• Add support for numpy.random.Generator

  good first issuekind/feature-requestkind/healthtriage/accepted
  quantumlib/Cirq#8374 · Filter by author arettig opened on Sep 23, 2026
  22

• TwoQubitGateTabulation returns an actual_gate inconsistent with its local_unitaries up to a global phase

  area/docskind/bug-reportskill/experiencedtriage/accepted
  quantumlib/Cirq#8362 · Filter by author WindOctober opened on Sep 20, 2026
  6

• defer_measurements ignores BitMaskKeyCondition.index and changes circuit behavior

  kind/bug-reportskill/experiencedtriage/acceptedtriage/wont-fix
  quantumlib/Cirq#8361 · Filter by author WindOctober opened on Sep 20, 2026
  6

• Deprecate the qcircuit package from Cirq contrib

  area/qcircuitarea/visualizationkind/feature-requestskill/maintainertriage/accepted
  quantumlib/Cirq#8355 · Filter by author mhucka opened on Sep 17, 2026
  

• Optimize add_dynamical_decoupling

  area/performanceskill/experiencedtriage/accepted
  quantumlib/Cirq#8348 · Filter by author pavoljuhas opened on Sep 15, 2026
  1

• Optimize merge_single_qubit_gates_to_phxz_symbolized

  area/performanceskill/experiencedtriage/accepted
  quantumlib/Cirq#8347 · Filter by author pavoljuhas opened on Sep 15, 2026
  

• Optimize CZGaugeTransformer.as_sweep

  area/performanceskill/experiencedtriage/accepted
  quantumlib/Cirq#8346 · Filter by author pavoljuhas opened on Sep 15, 2026
  

• Implement auto-labeling of issues and PRs

  area/devopshelp wantedkind/feature-requestno QC knowledge neededpriority/p3skill/experiencedtriage/accepted
  quantumlib/Cirq#8345 · Filter by author mhucka opened on Sep 15, 2026
  4

  

• Explore the use of Mypyc

  area/performancearea/pythonhelp wantedkind/feature-requestno QC knowledge neededskill/experttriage/accepted
  quantumlib/Cirq#8344 · Filter by author mhucka opened on Sep 15, 2026
  2

  

• Explore the use of Numba

  area/numpyarea/performancearea/pythonhelp wantedkind/feature-requestno QC knowledge neededskill/experttriage/accepted
  quantumlib/Cirq#8343 · Filter by author mhucka opened on Sep 15, 2026
  1

• Explore possibility of using free-threaded Python

  area/performancearea/pythonhelp wantedkind/feature-requestno QC knowledge neededskill/expert
  quantumlib/Cirq#8342 · Filter by author mhucka opened on Sep 15, 2026
  3

  

• Update simulator interfaces for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8341 · Filter by author mhucka opened on Sep 15, 2026
  2

• Implement qubit containers for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8340 · Filter by author mhucka opened on Sep 15, 2026
  2

  

• Implement multiway branch operators for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8339 · Filter by author mhucka opened on Sep 15, 2026
  2

  

• Implement control flow operator Cirq.For operator for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8338 · Filter by author mhucka opened on Sep 15, 2026
  2

  

• Implement control flow operator Cirq.Repeat for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8337 · Filter by author mhucka opened on Sep 15, 2026
  

• Implement control flow operator Cirq.While for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8336 · Filter by author mhucka opened on Sep 15, 2026
  3

  

• Cirq 2.0 exploration and development parent issue

  area/cirq-2.0kind/design-issueskill/experttriage/accepted
  quantumlib/Cirq#8335 · Filter by author mhucka opened on Sep 15, 2026
  2

• to_qasm() on classically controlled multi-line gates (e.g. CCZ) only guards the first line

  area/qasmgood for learningkind/bug-reportno QC knowledge neededtriage/accepted
  quantumlib/Cirq#8329 · Filter by author WindOctober opened on Sep 12, 2026
  1

• Implement control flow operators for use with classical data for Cirq 2.0

  area/cirq-2.0kind/feature-requestskill/experiencedtriage/accepted
  quantumlib/Cirq#8302 · Filter by author mhucka opened on Sep 3, 2026
  2

• Investigate Python interpreter optimizations

  area/performancekind/feature-requestno QC knowledge neededtriage/needs-more-evidence
  quantumlib/Cirq#8296 · Filter by author mhucka opened on Sep 2, 2026
  1

• Replace TaggedOperation with a proper object proxy

  kind/design-issueskill/expertstatus/needs-agreed-designtriage/needs-feasibility
  quantumlib/Cirq#8268 · Filter by author daxfohl opened on Aug 11, 2026
  2

• Switch from mypy to Pyrefly

  kind/healthno QC knowledge neededtriage/accepted
  quantumlib/Cirq#8182 · Filter by author mhucka opened on Jul 6, 2026
  13