Issues

• protobuf dependency @cirq-google - Forschungszentrum Jülich

  triage/discuss
  quantumlib/Cirq#8414 · Filter by author AlvaroHuanay opened on Oct 6, 2026

• ZipLongest isn't preserved when Zipped

  kind/bug-reporttriage/discuss
  quantumlib/Cirq#8412 · Filter by author zchen088 opened on Oct 5, 2026
  

• cirq.Simulator does not properly handle measurements within looped circuit operations

  kind/bug-reporttriage/discuss
  quantumlib/Cirq#8410 · Filter by author eliottrosenberg opened on Oct 5, 2026
  

• Calibration.timestamp_str() adds timestamp % 1000000 microseconds to an already exact time

  triage/discuss
  quantumlib/Cirq#8407 · Filter by author qobserva-labs opened on Oct 4, 2026
  4

• [Bug]: Parameterized diagonal gates fail when printing circuit diagrams

  area/circuitsarea/visualizationkind/bug-reporttriage/accepted
  quantumlib/Cirq#8404 · Filter by author jyothikacodes opened on Oct 3, 2026
  2

  

• cirq.has_mixture returns True but cirq.mixture raises TypeError for decomposable unitary objects

  area/protocols/unitarykind/bug-reportpriority/p1triage/discuss
  quantumlib/Cirq#8402 · Filter by author mhucka opened on Oct 3, 2026

• [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
  23

  

• 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
  10

• defer_measurements ignores BitMaskKeyCondition.index and changes circuit behavior

  good for learninghelp wantedkind/bug-reportskill/experiencedtriage/acceptedtriage/wont-fix
  quantumlib/Cirq#8361 · Filter by author WindOctober opened on Sep 20, 2026
  7

• 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
  2

• 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
  2

• 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
  1

  

• 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