added basic skeleton of a qiskit backend

src/qutip_qip/qiskit/__init__.py

@@ -0,0 +1 @@
+from .provider import Provider

src/qutip_qip/qiskit/backend.py

@@ -0,0 +1,21 @@
+from .job import Job
+from qiskit import qobj
+
+
+class TestSimulator():
+
+    def __init__(self, configuration=None, provider=None, **fields):
+        pass
+        # super().__init__(configuration=configuration, provider=provider, **fields)
+
+    def run(self, qobj: qobj.Qobj, **backend_options):
+        job_id = 123
+        job = Job(self, job_id, self._run_job(job_id, qobj))
+        return job
+
+    def _run_job(self, job_id, qobj):
+        test_ret = {
+            "success": True,
+            "data": [1, 0, 0]
+        }
+        return test_ret

src/qutip_qip/qiskit/job.py

@@ -0,0 +1,9 @@
+
+class Job():
+
+    def __init__(self, backend, job_id, result):
+        # super().__init__(backend, job_id)
+        self._result = result
+
+    def result(self):
+        return self._result

src/qutip_qip/qiskit/provider.py

@@ -0,0 +1,23 @@
+from qiskit.providers.provider import ProviderV1 as QiskitProvider
+from .backend import TestSimulator
+
+SIMULATORS = [TestSimulator]
+
+
+class Provider(QiskitProvider):
+
+    def __init__(self):
+        super().__init__()
+
+        self.name = "qutip_provider"
+        self._backends = {"test_backend": TestSimulator()}
+
+    def backends(self, name=None, filters=None, **kwargs):
+        backends = list(self._backends.values())
+        if name:
+            try:
+                backends = [self._backends[name]]
+            except LookupError:
+                print("The '{}' backend is not installed in your system.".format(name))
+
+        return backends