From c1ffbc406d6b88c6fa2d4853d9242453e7865b1b Mon Sep 17 00:00:00 2001
From: Rohan Narayan <128184471+Rohan-1729@users.noreply.github.com>
Date: Tue, 18 Apr 2023 17:47:11 -0500
Subject: [PATCH 1/2] Delete demo_fluxonium.ipynb
---
examples/demo_fluxonium.ipynb | 22458 --------------------------------
1 file changed, 22458 deletions(-)
delete mode 100644 examples/demo_fluxonium.ipynb
diff --git a/examples/demo_fluxonium.ipynb b/examples/demo_fluxonium.ipynb
deleted file mode 100644
index ecaa7b3..0000000
--- a/examples/demo_fluxonium.ipynb
+++ /dev/null
@@ -1,22458 +0,0 @@
-{
- "cells": [
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "# scqubits example: the fluxonium qubit\n",
- "J. Koch and P. Groszkowski\n",
- "\n",
- "For further documentation of scqubits see https://scqubits.readthedocs.io/en/latest/.\n",
- "\n",
- "---"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 1,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-03-27T12:06:07.457721Z",
- "start_time": "2020-03-27T12:06:06.226978Z"
- },
- "init_cell": true,
- "pycharm": {
- "is_executing": false
- },
- "scrolled": true
- },
- "outputs": [],
- "source": [
- "%matplotlib inline\n",
- "%config InlineBackend.figure_format = 'svg'\n",
- "\n",
- "import numpy as np\n",
- "import scqubits as scq"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "# Fluxonium qubit"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "$H_\\text{fl}=-4E_\\text{C}\\partial_\\phi^2-E_\\text{J}\\cos(\\phi-\\varphi_\\text{ext}) +\\frac{1}{2}E_L\\phi^2$"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "**Creation via GUI** (ipywidgets needs to be installed for this to work.)"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 2,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-03-27T12:08:37.174509Z",
- "start_time": "2020-03-27T12:08:37.105692Z"
- }
- },
- "outputs": [
- {
- "data": {
- "application/vnd.jupyter.widget-view+json": {
- "model_id": "",
- "version_major": 2,
- "version_minor": 0
- },
- "text/plain": [
- "HBox(children=(VBox(children=(HBox(children=(Label(value='EJ [GHz]'), FloatText(value=8.9, layout=Layout(width…"
- ]
- },
- "metadata": {},
- "output_type": "display_data"
- },
- {
- "data": {
- "application/vnd.jupyter.widget-view+json": {
- "model_id": "",
- "version_major": 2,
- "version_minor": 0
- },
- "text/plain": [
- "Output()"
- ]
- },
- "metadata": {},
- "output_type": "display_data"
- }
- ],
- "source": [
- "fluxonium = scq.Fluxonium.create()"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 3,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-03-24T22:08:13.758806Z",
- "start_time": "2020-03-24T22:08:13.744843Z"
- }
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "Fluxonium-----------| [Fluxonium_1]\n",
- " | EJ: 8.9\n",
- " | EC: 2.5\n",
- " | EL: 0.5\n",
- " | flux: 0.0\n",
- " | cutoff: 110\n",
- " | truncated_dim: 10\n",
- " |\n",
- " | dim: 110\n",
- "\n"
- ]
- }
- ],
- "source": [
- "print(fluxonium)"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "**Programmatic creation**"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 4,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-03-27T12:06:07.463676Z",
- "start_time": "2020-03-27T12:06:07.459683Z"
- }
- },
- "outputs": [],
- "source": [
- "fluxonium2 = scq.Fluxonium(\n",
- " EJ=8.9,\n",
- " EC=2.5,\n",
- " EL=0.5,\n",
- " cutoff = 110,\n",
- " flux = 0.5\n",
- ")"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Computing and visualizing spectra"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 5,
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "array([-2.7022458 , 6.05619946, 6.27730681, 8.29978855, 14.23074422,\n",
- " 16.86961382])"
- ]
- },
- "execution_count": 5,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "fluxonium.eigenvals()"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 6,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-03-24T22:08:15.008710Z",
- "start_time": "2020-03-24T22:08:14.988765Z"
- }
- },
- "outputs": [
- {
- "data": {
- "text/plain": [
- "array([-2.7022458 , 6.05619946, 6.27730681, 8.29978855, 14.23074422,\n",
- " 16.86961382])"
- ]
- },
- "execution_count": 6,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "fluxonium.eigenvals()"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 7,
- "metadata": {},
- "outputs": [
- {
- "data": {
- "application/vnd.jupyter.widget-view+json": {
- "model_id": "",
- "version_major": 2,
- "version_minor": 0
- },
- "text/plain": [
- "Spectral data: 0%| | 0/151 [00:00\r\n",
- "\r\n",
- "\r\n",
- "\r\n"
- ],
- "text/plain": [
- ""
- ]
- },
- "metadata": {
- "needs_background": "light"
- },
- "output_type": "display_data"
- }
- ],
- "source": [
- "flux_list = np.linspace(-0.5, 0.5, 151)\n",
- "fluxonium.plot_evals_vs_paramvals('flux', flux_list, evals_count=8);"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 8,
- "metadata": {},
- "outputs": [
- {
- "data": {
- "text/plain": [
- "array([[ 2.05740661e-01, 0.00000000e+00, -4.60050104e-01, ...,\n",
- " 0.00000000e+00, 1.78616165e-61, 0.00000000e+00],\n",
- " [ 0.00000000e+00, -4.44868435e-01, 0.00000000e+00, ...,\n",
- " -6.10025949e-59, 0.00000000e+00, 1.86480751e-60],\n",
- " [-4.60050104e-01, 0.00000000e+00, -6.67742262e-02, ...,\n",
- " 0.00000000e+00, -4.34635215e-58, 0.00000000e+00],\n",
- " ...,\n",
- " [ 0.00000000e+00, -6.10025949e-59, 0.00000000e+00, ...,\n",
- " -9.18367880e-02, 0.00000000e+00, -3.20968756e-02],\n",
- " [ 1.78616165e-61, 0.00000000e+00, -4.34635215e-58, ...,\n",
- " 0.00000000e+00, -4.30134088e-02, 0.00000000e+00],\n",
- " [ 0.00000000e+00, 1.86480751e-60, 0.00000000e+00, ...,\n",
- " -3.20968756e-02, 0.00000000e+00, -1.10641059e-02]])"
- ]
- },
- "execution_count": 8,
- "metadata": {},
- "output_type": "execute_result"
- }
- ],
- "source": [
- "fluxonium.cos_phi_operator()"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 10,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-02-13T22:55:09.192607Z",
- "start_time": "2020-02-13T22:55:05.949274Z"
- }
- },
- "outputs": [
- {
- "data": {
- "application/vnd.jupyter.widget-view+json": {
- "model_id": "",
- "version_major": 2,
- "version_minor": 0
- },
- "text/plain": [
- "Spectral data: 0%| | 0/151 [00:00\r\n",
- "\r\n",
- "\r\n",
- "\r\n"
- ],
- "text/plain": [
- ""
- ]
- },
- "metadata": {
- "needs_background": "light"
- },
- "output_type": "display_data"
- }
- ],
- "source": [
- "flux_list = np.linspace(-0.5, 0.5, 151)\n",
- "fluxonium.plot_evals_vs_paramvals('flux', flux_list, evals_count=8);"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 11,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-02-13T22:55:12.259399Z",
- "start_time": "2020-02-13T22:55:09.203572Z"
- }
- },
- "outputs": [
- {
- "data": {
- "application/vnd.jupyter.widget-view+json": {
- "model_id": "",
- "version_major": 2,
- "version_minor": 0
- },
- "text/plain": [
- "Spectral data: 0%| | 0/151 [00:00\r\n",
- "\r\n",
- "\r\n",
- "\r\n"
- ],
- "text/plain": [
- ""
- ]
- },
- "metadata": {
- "needs_background": "light"
- },
- "output_type": "display_data"
- }
- ],
- "source": [
- "fluxonium.plot_evals_vs_paramvals('flux', flux_list, evals_count=9, subtract_ground=True);"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 12,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-02-13T22:55:15.087870Z",
- "start_time": "2020-02-13T22:55:14.155331Z"
- }
- },
- "outputs": [
- {
- "data": {
- "image/svg+xml": [
- "\r\n",
- "\r\n",
- "\r\n",
- "\r\n"
- ],
- "text/plain": [
- ""
- ]
- },
- "metadata": {
- "needs_background": "light"
- },
- "output_type": "display_data"
- }
- ],
- "source": [
- "fluxonium.flux = 0.5\n",
- "fluxonium.plot_wavefunction(esys=None, which=range(5), mode='real');"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 13,
- "metadata": {},
- "outputs": [
- {
- "data": {
- "image/svg+xml": [
- "\r\n",
- "\r\n",
- "\r\n",
- "\r\n"
- ],
- "text/plain": [
- ""
- ]
- },
- "metadata": {
- "needs_background": "light"
- },
- "output_type": "display_data"
- }
- ],
- "source": [
- "fluxonium = scq.Fluxonium(\n",
- " EJ=5.7,\n",
- " EC=1.2,\n",
- " EL=1.0,\n",
- " cutoff = 150,\n",
- " flux = 0.5\n",
- ")\n",
- "fig, axes=fluxonium.plot_wavefunction(esys=None, which=[0,1,2,3,4,5], mode='real');"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Matrix elements"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 14,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-02-13T22:55:23.804641Z",
- "start_time": "2020-02-13T22:55:22.664581Z"
- }
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "[[-2.90163865e-14 -2.42020774e+00 5.90469630e-15 -5.96669304e-01\n",
- " -2.03234656e-15 1.26034410e-02 5.95007150e-16 1.05152531e-02\n",
- " -1.74134593e-15 -2.08796925e-03]\n",
- " [-2.42020774e+00 3.00354610e-14 1.16100233e+00 3.24395106e-15\n",
- " -1.98939356e-01 -7.54922082e-17 1.96392027e-02 -1.61667425e-15\n",
- " -1.88229452e-03 -5.82740140e-16]\n",
- " [ 5.90469630e-15 1.16100233e+00 2.41381156e-16 2.02810531e+00\n",
- " 1.37402274e-15 -2.87499531e-01 2.56172447e-16 -3.19256763e-02\n",
- " 5.97912002e-16 1.96457721e-04]\n",
- " [-5.96669304e-01 3.24395106e-15 2.02810531e+00 6.91353555e-16\n",
- " -2.11221368e+00 -2.34689704e-15 -1.78076985e-01 2.51487532e-15\n",
- " -4.52028150e-02 2.16859244e-15]\n",
- " [-2.03234656e-15 -1.98939356e-01 1.37402274e-15 -2.11221368e+00\n",
- " -3.58037476e-15 2.41344721e+00 9.55042118e-16 -1.41490331e-01\n",
- " -1.89666319e-15 5.74957935e-02]\n",
- " [ 1.26034410e-02 -7.54922082e-17 -2.87499531e-01 -2.34689704e-15\n",
- " 2.41344721e+00 -6.45618181e-15 2.65902027e+00 5.82901810e-15\n",
- " -7.06894388e-02 3.34797329e-15]\n",
- " [ 5.95007150e-16 1.96392027e-02 2.56172447e-16 -1.78076985e-01\n",
- " 9.55042118e-16 2.65902027e+00 3.66400698e-15 -2.95543793e+00\n",
- " -8.25765333e-15 2.89606649e-02]\n",
- " [ 1.05152531e-02 -1.61667425e-15 -3.19256763e-02 2.51487532e-15\n",
- " -1.41490331e-01 5.82901810e-15 -2.95543793e+00 -1.23135517e-14\n",
- " 3.32236039e+00 -2.75391230e-14]\n",
- " [-1.74134593e-15 -1.88229452e-03 5.97912002e-16 -4.52028150e-02\n",
- " -1.89666319e-15 -7.06894388e-02 -8.25765333e-15 3.32236039e+00\n",
- " 4.75438291e-14 3.82811850e+00]\n",
- " [-2.08796925e-03 -5.82740140e-16 1.96457721e-04 2.16859244e-15\n",
- " 5.74957935e-02 3.34797329e-15 2.89606649e-02 -2.75391230e-14\n",
- " 3.82811850e+00 9.58022230e-15]]\n"
- ]
- }
- ],
- "source": [
- "phimat = fluxonium.matrixelement_table('phi_operator', evals_count=10)\n",
- "print(phimat)"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 15,
- "metadata": {
- "ExecuteTime": {
- "end_time": "2020-02-13T22:55:27.409939Z",
- "start_time": "2020-02-13T22:55:25.414225Z"
- }
- },
- "outputs": [
- {
- "data": {
- "image/svg+xml": [
- "\r\n",
- "\r\n",
- "\r\n",
- "