fix scaling of field [no ci]

Author: vpratz

examples/experimental/Spatial_Data.ipynb

@@ -112,8 +112,8 @@
     "\n",
     "\n",
     "def distribution(shape):\n",
-    "    a = np.random.normal(loc=0, scale=1, size=shape)\n",
-    "    b = np.random.normal(loc=0, scale=1, size=shape)\n",
+    "    a = np.random.normal(loc=0, scale=np.sqrt(np.prod(shape)), size=shape)\n",
+    "    b = np.random.normal(loc=0, scale=np.sqrt(np.prod(shape)), size=shape)\n",
     "    return a + 1j * b"
    ]
   },