From 20beefd1ed61c13d59be5fc0c89b30e25b4f9c2c Mon Sep 17 00:00:00 2001
From: "Stefan J. Wernli" <swernli@microsoft.com>
Date: Tue, 10 Feb 2026 14:36:10 -0800
Subject: [PATCH] Support Helios in Quantinuum target and backends

---
 .../quantum/qiskit/backends/quantinuum.py     | 22 ++++++++++++++++---
 .../azure/quantum/target/quantinuum.py        | 12 ++++++++--
 azure-quantum/requirements-qsharp.txt         |  2 +-
 3 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/azure-quantum/azure/quantum/qiskit/backends/quantinuum.py b/azure-quantum/azure/quantum/qiskit/backends/quantinuum.py
index a08d67945..d7950055c 100644
--- a/azure-quantum/azure/quantum/qiskit/backends/quantinuum.py
+++ b/azure-quantum/azure/quantum/qiskit/backends/quantinuum.py
@@ -63,6 +63,8 @@ def _get_n_qubits(name):
     name = name.lower()
     if ".h2-" in name:
         return 56
+    if ".helios-" in name:
+        return 98
     warnings.warn(
         UserWarning(f"Number of qubits not known for target {name}. Defaulting to 20."))
     return 20
@@ -101,12 +103,18 @@ def _azure_config(self) -> Dict[str, str]:
     def _get_n_qubits(self, name):
         return _get_n_qubits(name)
     
+    def _get_default_target_profile(self, name):
+        if ".h2-" in name:
+            return TargetProfile.Adaptive_RI
+        else:
+            return TargetProfile.Adaptive_RIF
 
 class QuantinuumSyntaxCheckerQirBackend(QuantinuumQirBackendBase):
     backend_names = (
         # Note: Target names on the same line are equivalent.
         "quantinuum.sim.h2-1sc",
-        "quantinuum.sim.h2-2sc"
+        "quantinuum.sim.h2-2sc",
+        "quantinuum.sim.helios-1sc",
     )
 
     def __init__(self, name: str, provider: "AzureQuantumProvider", **kwargs):
@@ -137,6 +145,8 @@ def __init__(self, name: str, provider: "AzureQuantumProvider", **kwargs):
         logger.info(
             "Initializing %sSyntaxCheckerQirBackend", self._provider_name
         )
+        if "target_profile" not in kwargs:
+            kwargs["target_profile"] = self._get_default_target_profile(name)
         super().__init__(configuration=configuration, provider=provider, **kwargs)
 
 
@@ -144,7 +154,8 @@ class QuantinuumEmulatorQirBackend(QuantinuumQirBackendBase):
     backend_names = (
         # Note: Target names on the same line are equivalent.
         "quantinuum.sim.h2-1e",
-        "quantinuum.sim.h2-2e"
+        "quantinuum.sim.h2-2e",
+        "quantinuum.sim.helios-1e",
     )
 
     def __init__(self, name: str, provider: "AzureQuantumProvider", **kwargs):
@@ -175,6 +186,8 @@ def __init__(self, name: str, provider: "AzureQuantumProvider", **kwargs):
         logger.info(
             "Initializing %sEmulatorQirBackend", self._provider_name
         )
+        if "target_profile" not in kwargs:
+            kwargs["target_profile"] = self._get_default_target_profile(name)
         super().__init__(configuration=configuration, provider=provider, **kwargs)
 
 
@@ -182,7 +195,8 @@ class QuantinuumQPUQirBackend(QuantinuumQirBackendBase):
     backend_names = (
         # Note: Target names on the same line are equivalent.
         "quantinuum.qpu.h2-1",
-        "quantinuum.qpu.h2-2"
+        "quantinuum.qpu.h2-2",
+        "quantinuum.qpu.helios-1",
     )
 
     def __init__(self, name: str, provider: "AzureQuantumProvider", **kwargs):
@@ -211,6 +225,8 @@ def __init__(self, name: str, provider: "AzureQuantumProvider", **kwargs):
             kwargs.pop("configuration", default_config)
         )
         logger.info("Initializing %sQPUQirBackend", self._provider_name)
+        if "target_profile" not in kwargs:
+            kwargs["target_profile"] = self._get_default_target_profile(name)
         super().__init__(configuration=configuration, provider=provider, **kwargs)
 
 
diff --git a/azure-quantum/azure/quantum/target/quantinuum.py b/azure-quantum/azure/quantum/target/quantinuum.py
index 9be7b46e0..d3419d413 100644
--- a/azure-quantum/azure/quantum/target/quantinuum.py
+++ b/azure-quantum/azure/quantum/target/quantinuum.py
@@ -2,7 +2,7 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 ##
-from typing import Any, Dict, Union
+from typing import Any, Dict, Union, Optional
 from warnings import warn
 
 from azure.quantum.job.job import Job
@@ -20,6 +20,9 @@ class Quantinuum(Target):
         "quantinuum.qpu.h2-2",
         "quantinuum.sim.h2-2sc",
         "quantinuum.sim.h2-2e",
+        "quantinuum.qpu.helios-1",
+        "quantinuum.sim.helios-1sc",
+        "quantinuum.sim.helios-1e",
     )
 
     _SHOTS_PARAM_NAME = "shots"
@@ -34,12 +37,17 @@ def __init__(
         provider_id: str = "quantinuum",
         content_type: str = "application/qasm",
         encoding: str = "",
-        target_profile: Union[str, "TargetProfile"] = "Adaptive_RI",
+        target_profile: Optional[Union[str, "TargetProfile"]] = None,
         **kwargs
     ):
         if capability:
             msg = "The 'capability' parameter is not used for the Quantinuum target."
             warn(msg, DeprecationWarning)
+        if target_profile is None:
+            if ".h2-" in name:
+                target_profile = "Adaptive_RI"
+            else:
+                target_profile = "Adaptive_RIF"
         super().__init__(
             workspace=workspace,
             name=name,
diff --git a/azure-quantum/requirements-qsharp.txt b/azure-quantum/requirements-qsharp.txt
index ae0190598..bd2cf2777 100644
--- a/azure-quantum/requirements-qsharp.txt
+++ b/azure-quantum/requirements-qsharp.txt
@@ -1 +1 @@
-qsharp>=1.0.33,<2.0
\ No newline at end of file
+qsharp>=1.26.0,<2.0
\ No newline at end of file