Superconducting Circuit Builder

This is a GUI for designing superconducting circuits in the lumped-element limit intended to accompany the Python package scQubits.

Installation

pip install sccircuitbuilder

Usage

Run import sccircuitbuilder as sc, then sc.GUI(). The elements used to build a circuit are

1. Capacitor
2. Inductor
3. Josephson Junction

Drag the icons from the toolbox onto the canvas to place down an element. Drag nodes together to connect them. Left-click on wires to add anchor points and drag the anchor points to guide the wires. Export the circuit to scqubits to diagonalize and simulate the circuit!

Keyboard

• Shift + Right Click - add to selection
• Shift + Right Drag - add box to selection
• Enter on property entry box - change property

Mouse

• Left Button Drag on whitespace - pan
• Scroll Wheel - zoom
• Left Button Drag on element/selected group - move selection
• Right Button Drag - box selection
• Left Button Click on element - rotate
• Right Button Click on element - select and show properties

Features

• Split (reverse-join) nodes
• Delete elements
• Wire anchor points
• Undo / Redo
• Save / Open
• Export to scQubits circuit format
• Pre-made circuit library

Future plans

• Offset charge / external flux
• Further integration with scqubits
• Accompanying tutorials

Known issues

• Right click has no activation distance, so using a mouse will result in some dropped right clicks
• Sometime import/undo/redo (the memento-based functionalities) crash, but usually they seem to work
• File save is not very inteligent and adds .circuit to the end of the filename regardless of whether it is already there