From fb836f574022edd85a1b3051a95b804378b7ffdc Mon Sep 17 00:00:00 2001
From: kevin-tian <kevin.tian@ibm.com>
Date: Mon, 4 Aug 2025 14:49:51 -0400
Subject: [PATCH] cleanup backend config fields

---
 qiskit_ibm_runtime/ibm_backend.py             | 11 --------
 .../models/backend_configuration.py           | 27 +++++--------------
 2 files changed, 7 insertions(+), 31 deletions(-)

diff --git a/qiskit_ibm_runtime/ibm_backend.py b/qiskit_ibm_runtime/ibm_backend.py
index c93ee197f..3c7cbf7ae 100644
--- a/qiskit_ibm_runtime/ibm_backend.py
+++ b/qiskit_ibm_runtime/ibm_backend.py
@@ -85,11 +85,6 @@ class IBMBackend(Backend):
         * target: A :class:`qiskit.transpiler.Target` object for the backend.
         * basis_gates: list of basis gates names on the backend.
         * gates: list of basis gates on the backend.
-        * local: backend is local or remote.
-        * simulator: backend is a simulator.
-        * conditional: backend supports conditional operations.
-        * open_pulse: backend supports open pulse.
-        * memory: backend supports memory.
         * coupling_map (list): The coupling map for the device
         * supported_instructions (List[str]): Instructions supported by the backend.
         * dynamic_reprate_enabled (bool): whether delay between primitives can be set dynamically
@@ -133,12 +128,9 @@ class IBMBackend(Backend):
         * online_date (datetime): The date that the device went online
         * display_name (str): Alternate name field for the backend
         * description (str): A description for the backend
-        * tags (list): A list of string tags to describe the backend
         * version: version of ``Backend`` class (Ex: 1, 2)
         * channels: An optional dictionary containing information of each channel -- their
           purpose, type, and qubits operated on.
-        * parametric_pulses (list): A list of pulse shapes which are supported on the backend.
-          For example: ``['gaussian', 'constant']``
         * processor_type (dict): Processor type for this backend. A dictionary of the
           form ``{"family": <str>, "revision": <str>, segment: <str>}`` such as
           ``{"family": "Canary", "revision": "1.0", segment: "A"}``.
@@ -410,9 +402,6 @@ def configuration(
         `Qiskit/ibm-quantum-schemas/backend_configuration
         <https://github.com/Qiskit/ibm-quantum-schemas/blob/main/schemas/backend_configuration_schema.json>`_.
 
-        More details about backend configuration properties can be found here `QasmBackendConfiguration
-        <https://quantum.cloud.ibm.com/docs/api/qiskit/1.4/qiskit.providers.models.QasmBackendConfiguration>`_.
-
         IBM backends may also include the following properties:
             * ``supported_features``: a list of strings of supported features like "qasm3" for dynamic
                 circuits support.
diff --git a/qiskit_ibm_runtime/models/backend_configuration.py b/qiskit_ibm_runtime/models/backend_configuration.py
index e4fd7864a..946af5fbc 100644
--- a/qiskit_ibm_runtime/models/backend_configuration.py
+++ b/qiskit_ibm_runtime/models/backend_configuration.py
@@ -188,20 +188,7 @@ def __repr__(self) -> str:
 
 
 class QasmBackendConfiguration:
-    """Class representing an OpenQASM 2.0 Backend Configuration.
-
-    Attributes:
-        backend_name: backend name.
-        backend_version: backend version in the form X.Y.Z.
-        n_qubits: number of qubits.
-        basis_gates: list of basis gates names on the backend.
-        gates: list of basis gates on the backend.
-        local: backend is local or remote.
-        simulator: backend is a simulator.
-        conditional: backend supports conditional operations.
-        open_pulse: backend supports open pulse.
-        memory: backend supports memory.
-    """
+    """Class representing an OpenQASM 2.0 Backend Configuration."""
 
     _data: Dict[Any, Any] = {}
 
@@ -212,12 +199,12 @@ def __init__(
         n_qubits: int,
         basis_gates: list,
         gates: list,
-        local: bool,
-        simulator: bool,
-        conditional: bool,
-        open_pulse: bool,
-        memory: bool,
         coupling_map: list,
+        memory: bool = True,
+        open_pulse: bool = False,
+        conditional: bool = False,
+        simulator: bool = False,
+        local: bool = False,
         meas_levels: List[int] = None,
         meas_kernels: List[str] = None,
         discriminators: List[str] = None,
@@ -256,7 +243,7 @@ def __init__(
             conditional (bool): True if the backend supports conditional
                 operations
             open_pulse (bool): True if the backend supports OpenPulse
-            memory (bool): True if the backend supports memory
+            memory (bool): True if the is able to retrieve measurement results from individual shots.
             coupling_map (list): The coupling map for the device
             meas_levels: Supported measurement levels.
             meas_kernels: Supported measurement kernels.