Add newly serializable gates to supported grid device gates (#6499)

Author: NoureldinYosri

cirq-google/cirq_google/devices/grid_device.py

@@ -112,12 +112,24 @@ class _GateRepresentations:
     ),
     _GateRepresentations(
         gate_spec_name='phased_xz',
-        deserialized_forms=[cirq.PhasedXZGate, cirq.XPowGate, cirq.YPowGate, cirq.PhasedXPowGate],
+        deserialized_forms=[
+            cirq.PhasedXZGate,
+            cirq.XPowGate,
+            cirq.YPowGate,
+            cirq.PhasedXPowGate,
+            cirq.HPowGate,
+            cirq.GateFamily(cirq.I),
+            cirq.ops.SingleQubitCliffordGate,
+        ],
         serializable_forms=[
+            # TODO: Extend support to cirq.IdentityGate.
+            cirq.GateFamily(cirq.I),
             cirq.GateFamily(cirq.PhasedXZGate),
             cirq.GateFamily(cirq.XPowGate),
             cirq.GateFamily(cirq.YPowGate),
+            cirq.GateFamily(cirq.HPowGate),
             cirq.GateFamily(cirq.PhasedXPowGate),
+            cirq.GateFamily(cirq.ops.SingleQubitCliffordGate),
         ],
     ),
     _GateRepresentations(
@@ -263,7 +275,6 @@ def _deserialize_gateset_and_gate_durations(
                 g = cirq.GateFamily(g)
             gate_durations[g] = cirq.Duration(picos=gate_spec.gate_duration_picos)
 
-    # TODO(#4833) Add identity gate support
     # TODO(#5050) Add GlobalPhaseGate support
 
     return cirq.Gateset(*gates_list), gate_durations

cirq-google/cirq_google/devices/grid_device_test.py

@@ -92,6 +92,9 @@ def _create_device_spec_with_horizontal_couplings():
         cirq.ops.phased_x_z_gate.PhasedXZGate,
         cirq.ops.common_gates.XPowGate,
         cirq.ops.common_gates.YPowGate,
+        cirq.GateFamily(cirq.I),
+        cirq.ops.SingleQubitCliffordGate,
+        cirq.ops.HPowGate,
         cirq.ops.phased_x_gate.PhasedXPowGate,
         cirq.GateFamily(
             cirq.ops.common_gates.ZPowGate, tags_to_ignore=[cirq_google.PhysicalZTag()]
@@ -113,6 +116,9 @@ def _create_device_spec_with_horizontal_couplings():
         cirq.GateFamily(cirq.ops.phased_x_z_gate.PhasedXZGate): base_duration * 4,
         cirq.GateFamily(cirq.ops.common_gates.XPowGate): base_duration * 4,
         cirq.GateFamily(cirq.ops.common_gates.YPowGate): base_duration * 4,
+        cirq.GateFamily(cirq.ops.common_gates.HPowGate): base_duration * 4,
+        cirq.GateFamily(cirq.I): base_duration * 4,
+        cirq.GateFamily(cirq.ops.SingleQubitCliffordGate): base_duration * 4,
         cirq.GateFamily(cirq.ops.phased_x_gate.PhasedXPowGate): base_duration * 4,
         cirq.GateFamily(
             cirq.ops.common_gates.ZPowGate, tags_to_ignore=[cirq_google.PhysicalZTag()]
@@ -135,6 +141,9 @@ def _create_device_spec_with_horizontal_couplings():
                 cirq_google.FSimGateFamily(gates_to_accept=[cirq.SQRT_ISWAP_INV]),
                 cirq.ops.common_gates.XPowGate,
                 cirq.ops.common_gates.YPowGate,
+                cirq.ops.common_gates.HPowGate,
+                cirq.GateFamily(cirq.I),
+                cirq.ops.SingleQubitCliffordGate,
                 cirq.ops.phased_x_gate.PhasedXPowGate,
                 cirq.GateFamily(
                     cirq.ops.common_gates.ZPowGate, tags_to_ignore=[cirq_google.PhysicalZTag()]
@@ -154,6 +163,9 @@ def _create_device_spec_with_horizontal_couplings():
                 cirq_google.FSimGateFamily(gates_to_accept=[cirq.CZ]),
                 cirq.ops.common_gates.XPowGate,
                 cirq.ops.common_gates.YPowGate,
+                cirq.ops.common_gates.HPowGate,
+                cirq.GateFamily(cirq.I),
+                cirq.ops.SingleQubitCliffordGate,
                 cirq.ops.phased_x_gate.PhasedXPowGate,
                 cirq.GateFamily(
                     cirq.ops.common_gates.ZPowGate, tags_to_ignore=[cirq_google.PhysicalZTag()]