Change Log

Version 1.3.1

Major changes/additions

  • Coherence calculations for the majority of qubits. These allow for estimating coherence times and rates due to various noise channels.

  • A new units system: users can specify energy units of their system Hamiltonian. These units are automatically considered when plotting and in coherence time calculations.

  • Separated documentation and example jupyter notebooks into individual repositories, see scqubits-doc and scqubits-examples.

Minor changes/additions

  • Introduced tests for real-valuedness of zero-pi Hamiltonians for speedup.

  • New options in plotting (e.g. grid).

Bug fixes

  • Fixed bug preventing the proper disabling of the progress bar.

  • Various bug fixes and improvements of file IO operations.

  • Fixed issue with color legend bar in .plot_matrixelements.

Version 1.2.3

  • Bug fix: the FullZeroPi Hamiltonian was incorrect in the case of nonzero dC.

  • improvement: thanks to adjusted ARPACK options, diagonalization should be noticeably faster for ZeroPi and FullZeroPi.

  • make pathos and dill the default for multiprocessing.

Version 1.2.2

  • Bug fix: implementation of the add_hc=True flag in InteractionTerm involved a bug that could lead to incorrect results

  • update to plotting routines now supports various extra plotting options such as linestyle=... etc.

  • added TunableTransmon class for flux-tunable transmon, including junction asymmetry

  • limit support to Python >= 3.6

  • corrections to documentation of FullZeroPi

  • added missing jupyter notebook illustrating use of HilbertSpace and ParameterSweep

  • overhaul of file IO system now allows saving and loading various scqubit data via a custom h5 file format

  • ipywidget support for creating qubits inside jupyter (try, for example, tmon = scqubits.Transmon.create())

Version 1.2.1

  • update to the setup script to properly include testing data with the PyPi release.

Version 1.2

Major changes/additions

  • scqubits now offers multiprocessing support for a number of methods.

  • Introduced checks ensuring that umbrella objects like HilbertSpace and ParameterSweep instances do not accidentally go “out-of-sync” with respect to their basic components. When needed, warnings are thrown for the user to re-run sweeps or spectrum lookups.

Under the hood:

  • Monitoring for changes of interdependent class instances is implemented through a central dispatch system. (disable: settings.DISPATCH_ENABLED)

  • Removed HilbertSpace reference from within InteractionTerm (throws deprecation warning if still used)

  • Made HilbertSpace inherit from tuple rather than list; composition changes to HilbertSpace warrant generating a new HilbertSpace instance

  • Shifted InteractionTerm.hamiltonian to HilbertSpace.interaction_hamiltonian

  • Created DataStore as general purpose parent class to SpectrumData

  • No longer store custom data inside ParameterSweep, sweep_generators.py functions return DataStore objects

Version 1.1.1

  • fixed a bug in display of FluxQubit wavefunction

  • internal refactoring

Version 1.1.0

  • new class InteractionTerm works in tandem with HilbertSpace to ease setup of composite systems with pairwise interactions

  • new ParameterSweep class efficiently generates spectral data for performing a scan of a HilbertSpace object over an external parameters

  • new Explorer class introduces interactive plots (see docs and demo ipynb)

  • cleaned up implementation of file Serializable operations

Version 1.0.0 (first release)