🐛 [NA] Dropped Global Hadamard Gate

[ystade]

System and Environment Information

MAC OS 15.6.1
MQT QMAP 3.4.0dev@9c84575

Bug Description

When compiling a circuit with a global Hadamard Gate, this is dropped and does not exist in the resulting output.

Steps to Reproduce

Run the following contract:

from qiskit import QuantumCircuit
from mqt.core import load
from mqt.qmap.na.zoned import RoutingAgnosticCompiler, RoutingAwareCompiler
from mqt.qmap.na.zoned import ZonedNeutralAtomArchitecture

def global_h(num_qubits):
    """:returns: a global ry gate"""
    qc = QuantumCircuit(num_qubits)
    qc.h(range(num_qubits))
    return qc.to_gate(label="H")

qc = QuantumCircuit(5)
qc.append(global_h(5), range(5))

circ = load(qc)

arch = ZonedNeutralAtomArchitecture.from_json_string("""{
   "name": "Architecture with one entanglement and one storage zone",
   "operation_duration": {"rydberg_gate": 0.36, "single_qubit_gate": 52, "atom_transfer": 15},
   "operation_fidelity": {"rydberg_gate": 0.995, "single_qubit_gate": 0.9997, "atom_transfer": 0.999},
   "qubit_spec": {"T": 1.5e6},
   "storage_zones": [{
     "zone_id": 0,
     "slms": [{"id": 0, "site_separation": [3, 3], "r": 20, "c": 100, "location": [0, 0]}],
     "offset": [0, 0],
     "dimension": [297, 57]
   }],
   "entanglement_zones": [{
     "zone_id": 0,
     "slms": [
       {"id": 1, "site_separation": [12, 10], "r": 7, "c": 20, "location": [35, 67]},
       {"id": 2, "site_separation": [12, 10], "r": 7, "c": 20, "location": [37, 67]}
     ],
     "offset": [35, 67],
     "dimension": [230, 60]
   }],
   "aods": [{"id": 0, "site_separation": 2, "r": 100, "c": 100}],
   "rydberg_range": [[[30, 62], [270, 132]]]
 }""")

compiler = RoutingAwareCompiler(arch)

code = compiler.compile(circ)
print(code)

Got naviz:

atom (0.000, 57.000) atom0
atom (3.000, 57.000) atom1
atom (6.000, 57.000) atom2
atom (9.000, 57.000) atom3
atom (12.000, 57.000) atom4

[kriss-u]

I got an output like as follows.

This is expected, right?

mqt.core: 3.4.1
qiskit: 2.2.3

[ystade]

@kriss-u You are absolutely right. When I opened this issue, I must have made a mistake because the Python code was not complete. The Python code that was part of the issue before correctly produced the output you are showing.

I have now updated the issue description with the full code. In particular, the part compiling for neutral atoms was missing.