Properties section, done

Author: lcapelluto

qiskit/advanced/terra/programming_with_pulses/gathering_system_information.ipynb

@@ -259,48 +259,72 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "It is a matter of style and personal preference whether you use `config.drive(0)` or `DriveChannel(0)`."
+    "It is a matter of style and personal preference whether you use `config.drive(0)` or `DriveChannel(0)`.\n",
+    "\n",
+    "## Properties\n",
+    "\n",
+    "The `backend` properties contain data that was measured and optionally reported by the provider. Let's see what kind of information is reported for qubit 0."
    ]
   },
   {
-   "cell_type": "markdown",
+   "cell_type": "code",
+   "execution_count": 10,
    "metadata": {},
+   "outputs": [],
    "source": [
-    "## Properties"
+    "props = backend.properties()"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 11,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Qubit 0 has a \n",
+      "  - T1 time of 179.20855318949387 microseconds\n",
+      "  - T2 time of 207.08071658715147 microseconds\n",
+      "  - U2 gate error of 0.0006168554137126238\n",
+      "  - U2 gate duration of 142.22222222222226 nanoseconds\n",
+      "  - resonant frequency of 4.9742936409604575 GHz\n"
+     ]
+    }
+   ],
    "source": [
-    "# Conversions from standard SI\n",
-    "us = 1e6\n",
-    "GHz = 1e-9\n",
-    "props = backend.properties()\n",
-    "# Qubit 0 T1 time in microsec\n",
-    "q0_t1_us = props.t1(0) * us\n",
-    "# Qubit 0 T2 time in microsec\n",
-    "q0_t2_us = props.t2(0) * us\n",
-    "# # Gate error for CNOT on qubits 0, 1\n",
-    "# cx_error = props.gate_error('cx', (0, 1))\n",
-    "# Resonant frequency of qubit 0\n",
-    "q2_freq_ghz = props.frequency(0) * GHz\n",
-    "# Duration of the X gate on qubit 0\n",
-    "q1_x_duration_us = props.gate_length('u2', 0) * us"
+    "def describe_qubit(qubit, properties):\n",
+    "    \"\"\"Print a string describing some of reported properties of the given qubit.\"\"\"\n",
+    "\n",
+    "    # Conversion factors from standard SI units\n",
+    "    us = 1e6\n",
+    "    ns = 1e9\n",
+    "    GHz = 1e-9\n",
+    "\n",
+    "    print(f\"Qubit {qubit} has a \\n\"\n",
+    "          f\"  - T1 time of {properties.t1(qubit) * us} microseconds\\n\"\n",
+    "          f\"  - T2 time of {properties.t2(qubit) * us} microseconds\\n\"\n",
+    "          f\"  - U2 gate error of {properties.gate_error('u2', qubit)}\\n\"\n",
+    "          f\"  - U2 gate duration of {properties.gate_length('u2', qubit) * ns} nanoseconds\\n\"\n",
+    "          f\"  - resonant frequency of {properties.frequency(qubit) * GHz} GHz\")\n",
+    "\n",
+    "describe_qubit(0, props)"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Defaults"
+    "Properties are not guaranteed to be reported, but backends without Pulse access typically also provide this data.\n",
+    "\n",
+    "## Defaults\n",
+    "\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {