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Cirq v0.6.0

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@Strilanc Strilanc released this 30 Oct 21:48
· 1 commit to v0.6.0-dev since this release
v0.6.0
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Strilanc Craig Gidney
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Major usability changes:

  • Pandas. cirq.TrialResult now has a data property that returns results as a pandas.DataFrame, providing access to all of pandas' convenience methods for working with data.
  • Qudit support. Added cirq.Qid.dimension and cirq.Operation._qid_shape_, as well as validation and simulator support.
  • Packaging. Package variant cirq[contrib] with requirements for cirq.contrib. Unstable package cirq-unstable tracking master.
  • Serialization. cirq.to_json and cirq.from_json methods can serialize (..almost) any cirq object.
  • Deterministic randomness. Almost all methods with random behavior now take a seed or numpy.Random instance.
  • Dropped support for python 2.7 and python 3.5.

New protocols:

  • cirq.equal_up_to_global_phase / _equal_up_to_global_phase_
  • cirq.qid_shape / _qid_shape_
  • cirq.num_qubits / _num_qubits_

New top level objects:

  • cirq.reset / cirq.ResetChannel
  • cirq.WaitGate
  • cirq.FSimGate
  • cirq.GlobalPhasedOperation (the first operation with no qubits)
  • cirq.ThreeQubitDiagonalGate
  • cirq.DensePauliString
  • cirq.MutableDensePauliString
  • cirq.ArithmeticOperation (helper class for defining arithmetic operations)
  • cirq.CCNOT = cirq.TOFFOLI alias
  • cirq.CX = cirq.CNOT alias
  • cirq.final_wavefunction
  • cirq.subwavefunction
  • cirq.wavefunction_partial_trace
  • cirq.von_neumann_entropy
  • cirq.apply_mixture
  • cirq.one_hot
  • cirq.axis_angle / cirq.AxisAngleDecomposition
  • cirq.apply_unitaries
  • cirq.approx_pauli_string_expectation
  • cirq.flatten[/_with_params/_with_sweep] for inlining complicated sympy expressions into sweeps
  • cirq.LinearCombinationOfOperations
  • cirq.PauliSum
  • cirq.SampleCollector
  • cirq.op_gate_of_type
  • cirq.op_gate_isinstance
  • cirq.NOISE_MODEL_LIKE (flexible argument type for specifying noise models)
  • cirq.PAULI_STRING_LIKE (flexible argument type for specifying pauli string arguments)
  • cirq.CliffordSimulator, cirq.StabilizerStateChForm, cirq.CliffordTableau, cirq.CliffordState, cirq.CliffordTrialResult (all still rough)
  • cirq.StabilizerStateChForm (still rough)
  • cirq.SimulatesAmplitudes interface
  • cirq.DepolarizingNoiseModel
  • cirq.DepolarizingWithReadoutNoiseModel
  • cirq.DepolarizingWithDampedReadoutNoiseModel
  • cirq.pow_pauli_combination

New sub package objects:

  • Added cirq.aqt package, which contains code to run cirq circuits on AQT's service.
  • cirq.experiments.cross_entropy_benchmarking
  • cirq.experiments.linear_xeb_fidelity
  • cirq.experiments.log_xeb_fidelity
  • cirq.experiments.log_xeb_fidelity_from_probabilities
  • cirq.experiments.t1_decay
  • cirq.experiments.xeb_fidelity
  • cirq.contrib.qasm_import.circuit_from_qasm
  • cirq.contrib.quirk.quirk_url_to_circuit
  • cirq.contrib.quirk.quirk_json_to_circuit
  • cirq.contrib.SVGCircuit
  • cirq.contrib.circuit_to_svg

Other changes (partial list):

  • Deprecated cirq.Circuit.from_ops in favor of cirq.Circuit.__init__
  • Deprecated cirq.Circuit.to_unitary_matrix in favor of cirq.Circuit.unitary
  • Deprecated cirq.Circuit.apply_unitary_effect_to_state in favor of cirq.Circuit.final_wavefunction
  • Deleted cirq.google.XmonSimulator (use cirq.Simulator instead)
  • cirq.approx_eq now recursively compares the items of iterables
  • cirq.resolve_parameters now recursively resolves the items of iterables
  • cirq.is_parameterized now recursively checks the items of iterables
  • Added cirq.TrialResult.data method
  • Added cirq.Sampler.sample method which returns a pandas.DataFrame
  • cirq.ControlledGate.on now returns a cirq.ControlledOperation instead of a cirq.GateOperation
  • simulator_state method on simulators is now private _simulator_state
  • cirq.QasmUGate.__init__ now takes operations in the same order as defined in QASM spec
  • cirq.PhasedXPowGate now longer auto-transforms itself into cirq.XPowGate or cirq.YPowGate at special phase angles
  • Attempting to sample a circuit with no measurements now raises an error
  • Fixed cirq.kak_canonicalize_vector not ensuring z>=0 when x=pi/4.
  • Added cirq.PauliString.__add__/__sub__ methods
  • Added cirq.PauliString.conjugated_by method
  • Added cirq.PauliString.dense method
  • Added cirq.X/Y/ZPowGate.__add__/__sub__ methods
  • Generalized cirq.Circuit.__init__ to take any tree of moments/operations.
  • Added cirq.PauliString._unitary_ methods
  • Added DensityMatrixTrialResult.__str__
  • Added a py.typed file telling mypy it can use cirq's inline type annotations
  • Added cirq.PeriodicValue.__repr__
  • cirq.GateOperation._pauli_expansion_
  • Controlling by nothing (operation.controlled_by()) now has no effect instead of unnecessarily wrapping
  • Added cirq.PauliString._decompose_
  • Added cirq.GridQubit.square static method
  • Added cirq.GridQubit.rect static method
  • Added cirq.GridQubit.from_pic static method
  • Added cirq.Circuit.__iadd__
  • Added cirq.PauliString.__bool__
  • Density matrix simulator now uses apply_channel when possible
  • Fixed cirq.AsymmetricDepolarizingChannel._circuit_diagram_info_ ignoring precision argument
  • cirq.SingleQubitGate.on_each method now takes any tree of qids
  • Added cirq.SimulationTrialResult.qubit_map method
  • Added cirq.KakDecomposition.__str__ method
  • Added cirq.control.UndirectedGraphDevice
  • Added CircuitDag.all_qubits
  • Added CircuitDag.is_topologically_sorted
  • Added CircuitDag.get_logical_operations
  • Added CircuitDag.random_circuit_dag
  • Added CircuitDag.random_topological_sort
  • Added examples/swap_networks.py
  • Added examples/qaoa.py
  • Added cirq.X/Y/ZPowGate.in_su2
  • Added cirq.X/Y/ZPowGate.with_canonical_global_phase
  • Added cirq.GridQubit.__add__/__sub__
  • Added cirq.LineQubit.__add__/__sub__
  • Added Circuit.with_noise method
  • Added cirq.Moment.__pow__
  • Added cirq.Sweep.__getitem__ with slice support
  • Added cirq.SynchronizeTerminalMeasurements.
  • cirq.experiments.RabiResult.plot now sets y axis range to [0, 1].
  • Fixed backwards qubit ordering in cirq.experiments.two_qubit_state_tomography
  • Fixed Circuit.findall_operations_until_blocked double counting operations
  • Added cirq.Sampler.run_sweep_async
  • Generalized cirq.PauliString.__init__ to take any tree of Pauli operations or dictionary from qubit to Pauli operation or complex number
  • cirq.EjectZ optimizer can now commute Z gates through swap-like gates
  • Continued development on cirq.google.QuantumEngine related classes, e.g. defined more flexible v2 proto serialization format
  • Fixed several instances of checking for sympy.Symbol instead of sympy.Basic
  • Added cirq.vis.Heatmap
  • cirq.EjectZ optimizer copes better in the presence of symbolic parameters
  • cirq.EjectPhasedPaulis optimizer copes better in the presence of symbolic parameters
  • Fixed several cases of simulators ignoring cirq.MeasurementGate.invert_mask
  • Fixed cirq.CSwapGate now supporting equality comparisons
  • cirq.Sweepable type union now allows dictionaries and lists of dictionaries
  • Added cirq.scatter_plot_normalized_kak_interaction_coefficients method
  • cirq.Moment.__eq__ no longer cares about operation order
  • Added cirq.TrialResult.__add__ method
  • Renamed cirq.experiments.generate_supremancy_circuit[...] to cirq.google.generate_boixo_2018_supremacy_circuits_[...]
  • Added cirq.Circuit.transform_qubits method
  • Fixed cirq.approx_eq hanging when given strings
  • Added cirq.kak_vector method for quickly computing many kak coefficients
  • cirq.Duration.__init__ now accepts timedelta and sympy.Basic values
  • Added ConstantQubitNoiseModel.__eq__
  • Added ConstantQubitNoiseModel.__repr__
  • Re-arranged some files within the cirq.ops package
  • Fixed cirq.SWAP and cirq.ISWAP decompositions not preserving global phase

Notable dev changes:

  • Defined development package variant cirq[dev-env] which includes development environment requirements
  • We have gradually begun deprecating things instead of simply deleting them.
  • Auto deploy to cirq-dev on push to master.
  • Continuous integration on Windows, OSX, and Linux instances instead of just Linux.
  • Incremental build tools compare against mergebase master instead of master itself
  • Added cirq.value.ABCMetaImplementAnyOneOf metaclass with cirq.value.alternative decorator
  • We have started adding doctest-ed Examples section to some doc strings
  • Added --actually_quiet parameter to the pytest check script
  • _compat.proper_repr now also works on pandas data frames.
  • Deleted continuous-integration/ in favor of check/ scripts
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