Note

This page was generated from circuit-examples//A.Qubits//08-JJ-Dolan.ipynb.

Josephson Junction (Dolan)

We’ll be creating a Dolan style Josephson Junction.

# So, let us dive right in. For convenience, let's begin by enabling
# automatic reloading of modules when they change.
%load_ext autoreload
%autoreload 2

import qiskit_metal as metal
from qiskit_metal import designs, draw
from qiskit_metal import MetalGUI, Dict, open_docs

# Each time you create a new quantum circuit design,
# you start by instantiating a QDesign class.

# The design class `DesignPlanar` is best for 2D circuit designs.

design = designs.DesignPlanar()

#Launch Qiskit Metal GUI to interactively view, edit, and simulate QDesign: Metal GUI
gui = MetalGUI(design)

A dolan style josephson junction

You can create a dolan style josephson junction from the QComponent Library, qiskit_metal.qlibrary.qubits. jj_dolan.py is the file containing our josephson junction so jj_dolan is the module we import. The jj_dolan class is our josephson junction. Like all quantum components, jj_dolan inherits from QComponent.

from qiskit_metal.qlibrary.qubits.JJ_Dolan import jj_dolan

# Be aware of the default_options that can be overridden by user.
design.overwrite_enabled = True
jj2 = jj_dolan(design, 'JJ2', options=dict(pos_x="0.1", pos_y="0.0"))
gui.rebuild()
gui.autoscale()
gui.zoom_on_components(['JJ2'])

# Save screenshot as a .png formatted file.

gui.screenshot()

# Screenshot the canvas only as a .png formatted file.
gui.figure.savefig('shot.png')

from IPython.display import Image, display
_disp_ops = dict(width=500)
display(Image('shot.png', **_disp_ops))

Closing the Qiskit Metal GUI

gui.main_window.close()

True

For more information, review the Introduction to Quantum Computing and Quantum Hardware lectures below

Superconducting Qubits I: Quantizing a Harmonic Oscillator, Josephson Junctions Part 1	Lecture Video	Lecture Notes	Lab
Superconducting Qubits I: Quantizing a Harmonic Oscillator, Josephson Junctions Part 2	Lecture Video	Lecture Notes	Lab
Superconducting Qubits I: Quantizing a Harmonic Oscillator, Josephson Junctions Part 3	Lecture Video	Lecture Notes	Lab
Superconducting Qubits II: Circuit Quantum Electrodynamics, Readout and Calibration Methods Part 1	Lecture Video	Lecture Notes	Lab
Superconducting Qubits II: Circuit Quantum Electrodynamics, Readout and Calibration Methods Part 2	Lecture Video	Lecture Notes	Lab
Superconducting Qubits II: Circuit Quantum Electrodynamics, Readout and Calibration Methods Part 3	Lecture Video	Lecture Notes	Lab