Add a couple of GaugeTransformer in the top-level init.

cirq-core/cirq/__init__.py

@@ -352,9 +352,11 @@
     align_left as align_left,
     align_right as align_right,
     CompilationTargetGateset as CompilationTargetGateset,
-    CZTargetGateset as CZTargetGateset,
     compute_cphase_exponents_for_fsim_decomposition as compute_cphase_exponents_for_fsim_decomposition,  # noqa: E501
+    CPhaseGaugeTransformerMM as CPhaseGaugeTransformerMM,
     create_transformer_with_kwargs as create_transformer_with_kwargs,
+    CZGaugeTransformer as CZGaugeTransformer,
+    CZTargetGateset as CZTargetGateset,
     decompose_clifford_tableau_to_operations as decompose_clifford_tableau_to_operations,
     decompose_cphase_into_two_fsim as decompose_cphase_into_two_fsim,
     decompose_multi_controlled_x as decompose_multi_controlled_x,
@@ -372,6 +374,7 @@
     HardCodedInitialMapper as HardCodedInitialMapper,
     index_tags as index_tags,
     is_negligible_turn as is_negligible_turn,
+    ISWAPGaugeTransformer as ISWAPGaugeTransformer,
     LineInitialMapper as LineInitialMapper,
     MappingManager as MappingManager,
     map_clean_and_borrowable_qubits as map_clean_and_borrowable_qubits,
@@ -402,6 +405,9 @@
     single_qubit_matrix_to_phased_x_z as single_qubit_matrix_to_phased_x_z,
     single_qubit_matrix_to_phxz as single_qubit_matrix_to_phxz,
     single_qubit_op_to_framed_phase_form as single_qubit_op_to_framed_phase_form,
+    SpinInversionGaugeTransformer as SpinInversionGaugeTransformer,
+    SqrtCZGaugeTransformer as SqrtCZGaugeTransformer,
+    SqrtISWAPGaugeTransformer as SqrtISWAPGaugeTransformer,
     stratified_circuit as stratified_circuit,
     symbolize_single_qubit_gates_by_indexed_tags as symbolize_single_qubit_gates_by_indexed_tags,
     synchronize_terminal_measurements as synchronize_terminal_measurements,

cirq-core/cirq/transformers/gauge_compiling/cz_gauge.py

@@ -17,6 +17,7 @@
 from __future__ import annotations
 
 from cirq import ops
+from cirq._doc import document
 from cirq.ops.common_gates import CZ
 from cirq.transformers.gauge_compiling.gauge_compiling import (
     ConstantGauge,
@@ -46,3 +47,10 @@
 )
 
 CZGaugeTransformer = GaugeTransformer(target=CZ, gauge_selector=CZGaugeSelector)
+document(
+    CZGaugeTransformer,
+    r"""A GaugeTransformer that gauges CZ gates.
+
+    Usage: `CZGaugeTransformer(circuit)` will return a new circuit with all CZ gates gauged by the CZGaugeSelector gauge.
+    """,
+)

cirq-core/cirq/transformers/gauge_compiling/iswap_gauge.py

@@ -19,6 +19,7 @@
 import numpy as np
 
 from cirq import ops
+from cirq._doc import document
 from cirq.transformers.gauge_compiling.gauge_compiling import (
     ConstantGauge,
     Gauge,
@@ -105,3 +106,10 @@ def sample(self, gate: ops.Gate, prng: np.random.Generator) -> ConstantGauge:
 ISWAPGaugeTransformer = GaugeTransformer(
     target=ops.ISWAP, gauge_selector=GaugeSelector(gauges=[RZRotation(), XYRotation()])
 )
+document(
+    ISWAPGaugeTransformer,
+    r"""A GaugeTransformer that gauges ISWAP gates.
+
+    Usage: `ISWAPGaugeTransformer(circuit)` will return a new circuit with all ISWAP gates gauged by either the RZRotation gauge or the XYRotation gauge.
+    """,
+)

cirq-core/cirq/transformers/gauge_compiling/spin_inversion_gauge.py

@@ -17,6 +17,7 @@
 from __future__ import annotations
 
 from cirq import ops
+from cirq._doc import document
 from cirq.transformers.gauge_compiling.gauge_compiling import (
     GaugeSelector,
     GaugeTransformer,
@@ -33,3 +34,10 @@
 SpinInversionGaugeTransformer = GaugeTransformer(
     target=ops.GateFamily(ops.ZZPowGate), gauge_selector=SpinInversionGaugeSelector
 )
+document(
+    SpinInversionGaugeTransformer,
+    r"""A GaugeTransformer that gauges gates in the ZZPowGate family by either applying an X gate before and after the two qubits or doing nothing.
+
+    Usage: `SpinInversionGaugeTransformer(circuit)` will return a new circuit with all gates in the ZZPowGate family gauged by the gauges.
+    """,
+)

cirq-core/cirq/transformers/gauge_compiling/sqrt_cz_gauge.py

@@ -20,6 +20,7 @@
 from numbers import Real
 from typing import TYPE_CHECKING
 
+from cirq._doc import document
 from cirq.ops import CZ, CZPowGate, Gate, Gateset, S, X
 from cirq.transformers.gauge_compiling.gauge_compiling import (
     ConstantGauge,
@@ -82,3 +83,10 @@ def _symbolize_as_cz_pow(
         symbolizer_fn=_symbolize_as_cz_pow, n_symbols=1
     ),
 )
+document(
+    SqrtCZGaugeTransformer,
+    r"""A GaugeTransformer that gauges CZ**0.5 and CZ**-0.5 gates.
+
+    Usage: `SqrtCZGaugeTransformer(circuit)` will return a new circuit with all CZ**0.5 and CZ**-0.5 gates gauged by the SqrtCZGauge gauge.
+    """,
+)

cirq-core/cirq/transformers/gauge_compiling/sqrt_iswap_gauge.py

@@ -19,6 +19,7 @@
 import numpy as np
 
 from cirq import ops
+from cirq._doc import document
 from cirq.transformers.gauge_compiling.gauge_compiling import (
     ConstantGauge,
     Gauge,
@@ -95,3 +96,10 @@ def sample(self, gate: ops.Gate, prng: np.random.Generator) -> ConstantGauge:
 SqrtISWAPGaugeTransformer = GaugeTransformer(
     target=ops.SQRT_ISWAP, gauge_selector=SqrtISWAPGaugeSelector
 )
+document(
+    SqrtISWAPGaugeTransformer,
+    r"""A GaugeTransformer that gauges SQRT_ISWAP gates.
+
+    Usage: `SqrtISWAPGaugeTransformer(circuit)` will return a new circuit with all SQRT_ISWAP gates gauged by either the RZRotation gauge or the XYRotation gauge.
+    """,
+)