v1.5 - May 2016

Notable changes:

• Increased maximum size of all display gates
• Fixed amplitudes display showing NaN for initial state on some machines
• Amplitude display now highlights which amplitude is being phased locked
• Added shadows to gates in toolbox, so they look more tangible
• Fixed WebGL being disabled not causing a known issue warning

v1.4 - May 2016

Notable user changes:

• Added amplitudes display
• Added log-scale indicators to amplitude/density displays
• Flipped the toolbox gate order vertically, so common-er gates are closer to the circuit
• Fixed chance gate appearing darker when covering more wires
• Showing favicon while loading
• Polished animation of time-varying rotation gates
• Fixed bloch sphere tooltips inverting the sign of X and Z
• Detection of known wontfix issues

Notable dev changes:

• Added hidden +/- postselection gates
• Made 16-qubit gates tractable by making the known matrix optional
• Gates defined in various files under src/gates instead of all in one file

v1.3 - May 2016

Notable user changes:

• Added Addition/Subtraction Gate
• Added Sample Display
• Chance Display is now resizable / can show multi-wire probabilities
• Density Matrix Display is now resizable and goes up to 5 qubits
• Added Gradient Gate
• Polished Counting Gate's animation
• Polished dragging large gates past current end of circuit
• Added more information to hover tooltips
• Fixed scrolling overriding dragging annoyance on Android
• Fixed hover highlight obscuring display gates

Notable dev changes:

• Gates are disabled if they cover a control (instead of crashing)
• Support for displays that need custom summary data
• Started defining gates in their own source file
• ShaderPipeline, RestartableRng, DisplayShaders

v1.2 - May 2016

Notable user changes:

• Fourier Transform gate
• Counting gate
• Resizable gates
• Value tooltips
• Context-sensitive cursor styling
• Empty circuit action hints
• Browser compatibility fixes
• Error reporting improvements
• Fixed multi-wire gates causing garbage output via unblocked recoherence
• 'Drag gates onto circuit / watch outputs change' hint
• 'Loading...' div

Notable dev changes:

• Error injection gate (id: "__debug__ErrorInjection")
• Added CodeClimate and fixed some of the identified issues
• Added doc folder
• Added unit tests for a few previously untested classes
• Added polyfills

v1.1 - April 2016

Main user changes:

• Added 2-qubit density matrix display.
• Added +1/-1 gates for 2/3/4 qubits.
• Added a favicon and an 'About' link.
• Work pauses when switching to a different tab.
• Post-Selection now applies BEFORE computing values for display gates in the same column.
• Fixed measured qubits blocking Controlled-Z and Controlled-PostSelection gates.
• Fixed some displays showing blanks instead of NaN
• Improved the unexpected errors experience (copyable text, issue reporting links, slow fade out, fallback to NaN).

Main dev changes:

• Added build-debug and test-travis grunt commands.
• Added support for gates with custom sizes and shaders.
• Added and optimized several Matrix methods as part of making Eve-Quantum-Clone-Computer.
• Added secret UniversalNot gate with custom shader

v1.0 - March 2016

This was the first version made available at algorithmicassertions.com/quirk.

The main change, compared to the unreleased version before it, is that performance was significantly improved and intermediate marginal states are actually computed.