HybridSuperQubits

HybridSuperQubits is a Python framework for simulating hybrid semiconductor-superconductor quantum circuits. It provides numerical tools for Hamiltonian diagonalization, energy spectra computation, noise susceptibility analysis, and wavefunction visualization across several qubit architectures.

This package is the companion software for:

J. J. Caceres et al., “FerBo: a noise resilient qubit hybridizing Andreev and fluxonium states”, arXiv:2604.01145 (2026).

Getting started

• Installation
  • Requirements
  • Quick install
  • Minimal install
  • Apple Silicon (M1/M2/M3/M4)
  • Development install
  • Optional dependency groups
• Quick start
  • Creating a FerBo qubit
  • Computing eigenvalues and eigenstates
  • Energy spectrum vs flux
  • Wavefunction visualization
  • Matrix elements
  • Noise analysis
  • Saving and loading results
  • Other qubit types
  • Unit conversions

Background

• Theory background
  • The FerBo qubit
  • Andreev pair qubit
  • Fluxonium
  • Gatemon
  • Gatemonium
  • Josephson junction array (JJA)
  • Resonator
  • Noise channels

API reference

• API reference
  • QubitBase
  • Ferbo
  • Andreev
  • Fluxonium
  • Gatemon
  • Gatemonium
  • Josephson junction array (JJA)
  • Resonator
  • Operators
  • Noise
  • Utilities
  • Storage

Additional resources

• Examples
• Citing HybridSuperQubits
• Changelog

Indices and tables

• Index

• Module Index

• Search Page