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Simplify decomposition of controlled eigengates with global phase

area/decomposition

area/eigengate

good for learningFor beginners in QC, this will help picking up some knowledge. Bit harder than "good first issues"For beginners in QC, this will help picking up some knowledge. Bit harder than "good first issues"

kind/design-issueA conversation around designA conversation around design

status/needs-agreed-designWe want to do this, but it needs an agreed upon design before implementationWe want to do this, but it needs an agreed upon design before implementation

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#7238 In quantumlib/Cirq;

· daxfohl opened on Apr 8, 2025

Passing a random number generator to simulator/sampler methods should VS maintaing an internal random state

good first issueThis issue can be resolved by someone who is not familiar with the codebase. A good starting issue.This issue can be resolved by someone who is not familiar with the codebase. A good starting issue.

kind/design-issueA conversation around designA conversation around design

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#6567 In quantumlib/Cirq;

· NoureldinYosri opened on Apr 22, 2024

 ·  

2025-T6: Code health and project maintenance

Consider creating a builder class for constructing circuits?

area/circuits

kind/design-issueA conversation around designA conversation around design

kind/healthFor CI/testing/release process/refactoring/technical debt itemsFor CI/testing/release process/refactoring/technical debt items

status/needs-agreed-designWe want to do this, but it needs an agreed upon design before implementationWe want to do this, but it needs an agreed upon design before implementation

triage/needs-more-evidence[Feature requests] Seems plausible, but maintainers are not convinced about the use cases yet[Feature requests] Seems plausible, but maintainers are not convinced about the use cases yet

Status: Open.

#6050 In quantumlib/Cirq;

· tanujkhattar opened on Apr 3, 2023

 ·  

2025-T5: Enhance functions for circuit construction and transformations

Use <code>_apply_channel_</code> when appropriate

area/channels

good for learningFor beginners in QC, this will help picking up some knowledge. Bit harder than "good first issues"For beginners in QC, this will help picking up some knowledge. Bit harder than "good first issues"

good part-time projectA meaty non-urgent issue with a substantial amount of work to be done.A meaty non-urgent issue with a substantial amount of work to be done.

kind/design-issueA conversation around designA conversation around design

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#5901 In quantumlib/Cirq;

· viathor opened on Oct 1, 2022

Should analytical decompositions return an empty list when decomposing identity operation?

area/decomposition

area/transformers

kind/design-issueA conversation around designA conversation around design

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#4831 In quantumlib/Cirq;

· tanujkhattar opened on Jan 12, 2022

 ·  

2025-T5: Enhance functions for circuit construction and transformations

Replace <code>_value_equality_values_cls_</code> in Phased* gates via specialized cirq.GateFamily's.

area/gates

area/gatesets

kind/design-issueA conversation around designA conversation around design

priority/reviewReassess the priority of this item at the next opportunity.Reassess the priority of this item at the next opportunity.

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#4585 In quantumlib/Cirq;

· tanujkhattar opened on Oct 18, 2021

Consolidate quantum state representations in cirq

area/states

kind/design-issueA conversation around designA conversation around design

status/needs-agreed-designWe want to do this, but it needs an agreed upon design before implementationWe want to do this, but it needs an agreed upon design before implementation

triage/needs-feasibility[Feature requests] Needs design work to prove feasibility before accepting[Feature requests] Needs design work to prove feasibility before accepting

Status: Open.

#4582 In quantumlib/Cirq;

· viathor opened on Oct 15, 2021

Keeping track of qubits you've measured

area/measurements

area/qubits

kind/design-issueA conversation around designA conversation around design

triage/acceptedA consensus emerged that this bug report, feature request, or other action should be worked onA consensus emerged that this bug report, feature request, or other action should be worked on

Status: Open.

#4449 In quantumlib/Cirq;

· mpharrigan opened on Aug 20, 2021

JSON backwards compatibility policy and tooling.

area/json

area/serialization

kind/design-issueA conversation around designA conversation around design

Status: Open.

#4321 In quantumlib/Cirq;

· mpharrigan opened on Jul 14, 2021

 ·  

2025-T3: Optimize circuit serialization

random_quantum_circuit_generation.random_rotations_between_grid_interaction_layers_circuit should use device_graph instead of qubits

area/xeb

kind/deprecation

kind/design-issueA conversation around designA conversation around design

priority/reviewReassess the priority of this item at the next opportunity.Reassess the priority of this item at the next opportunity.

Status: Open.

#3833 In quantumlib/Cirq;

· mpharrigan opened on Feb 18, 2021

Switch from using globalshift to using individual phases for each eigenspace

area/eigengate

area/gates

good for learningFor beginners in QC, this will help picking up some knowledge. Bit harder than "good first issues"For beginners in QC, this will help picking up some knowledge. Bit harder than "good first issues"

good part-time projectA meaty non-urgent issue with a substantial amount of work to be done.A meaty non-urgent issue with a substantial amount of work to be done.

kind/design-issueA conversation around designA conversation around design

Status: Open.

#1731 In quantumlib/Cirq;

· Strilanc opened on Jun 19, 2019