##Qy for Python

Quantum libraries all in one place. Control and automation, DAQ, IO, simulation, graphics, GUI, analysis.

###Installing qy depends on numpy and matplotlib. I am trying to avoid dependency on SciPy, but some functions still need it. You will need cython and SWIG if you want to compile from source.

####Windows I am periodically building windows installers. You can download them here. Under windows using mingw32, the following command seems to do the job when building from source:

> python setup.py build --compiler mingw32 install

####Linux Under linux, this is the command that I am using to compile/build and install qy:

$ python setup.py  install --user

The --user is optional.

Contents

qy is broken into six sub-packages, for analysis, input/output, simulation of linear optics and quantum information, interfaces to various bits of lab hardware and DAQ, graphical user interfaces, and miscellaneous stuff.

####Analysis Post-processing and analysis tools.

• Quantum metrics: quantum state fidelity, process fidelity, CHSH ...
• Classical metrics: Trace distance, statistical fidelity ...

####Formats Interface to non-standard binary formats.

• Fast interface to binary .counted files from DPC-230 timetagger

####Simulation Optimized code for simulating linear quantum optics and quantum information, some of which is written using cython.

• Optimized linear optics simulator. p photons in m modes. Reck schemes, quantum walks, interferometers, random unitaries.
• Optimized permanent in cython.
• Optimized factorials and combinatorics
• Detection model for fan-out pseudo number-resolving detectors
• QI fundamentals: Qubit bases, Pauli operators, two-qubit gates...

####Hardware Python drivers for various pieces of hardware.

• Motor controllers
• FPGA-based counting systems
• Lasers
• DAC (NI etc)
• ...

####GUI Useful wrappers for various bits of wxPython.

####Miscellaneous useful things

• Easier file access, numpy tools, command line tools...

###TODO

• Better handling of settings
• Make cython-based libraries optional
• Get rid of Scipy ($ grep -rl "scipy" ./)
• Stress test cython code in linear_optics
• Tidy up hardware modules, get code from other people e.g. PicoHarp