Anders and Briegel in Python
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index.rst 3.7KB

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  1. .. abp documentation master file, created by
  2. sphinx-quickstart on Sun Jul 24 18:12:02 2016.
  3. You can adapt this file completely to your liking, but it should at least
  4. contain the root `toctree` directive.
  5. ``abp``
  6. ===============================
  7. This is the documentation for ``abp``. It's a work in progress.
  8. .. toctree::
  9. :hidden:
  10. :maxdepth: 2
  11. modules
  12. ``abp`` is a Python port of Anders and Briegel' s `method <https://arxiv.org/abs/quant-ph/0504117>`_ for fast simulation of Clifford circuits.
  13. That means that you can make quantum states of thousands of qubits, perform any sequence of Clifford operations, and measure in any of :math:`\{\sigma_x, \sigma_y, \sigma_z\}`.
  14. .. image:: ../examples/demo.gif
  15. Installing
  16. ----------------------------
  17. You can install from ``pip``:
  18. .. code-block:: bash
  19. $ pip install --user abp
  20. Alternatively, clone from the `github repo <https://github.com/peteshadbolt/abp>`_ and run ``setup.py``:
  21. .. code-block:: bash
  22. $ git clone https://github.com/peteshadbolt/abp
  23. $ cd abp
  24. $ python setup.py install --user
  25. If you want to modify and test ``abp`` without having to re-install, switch into ``develop`` mode:
  26. .. code-block:: bash
  27. $ python setup.py develop --user
  28. Quickstart
  29. ----------------------------
  30. It's pretty easy to build a graph state, act some gates, and do measurements::
  31. >>> from abp import GraphState
  32. >>> g = GraphState(range(5))
  33. >>> for i in range(5):
  34. ... g.act_hadamard(i)
  35. ...
  36. >>> for i in range(4):
  37. ... g.act_cz(i, i+1)
  38. ...
  39. >>> print g
  40. 0: IA (1,)
  41. 1: IA (0,2)
  42. 2: IA (1,3)
  43. 3: IA (2,4)
  44. 4: IA (3,)
  45. >>> g.measure(2, "px")
  46. 0
  47. >>> print g
  48. 0: IA (3,)
  49. 1: ZC (3,)
  50. 2: IA -
  51. 3: ZA (0,1,4)
  52. 4: IA (3,)
  53. Working with GraphStates
  54. -------------------------
  55. The ``abp.GraphState`` class is the main interface to ``abp``.
  56. .. autoclass:: abp.GraphState
  57. .. automethod:: abp.GraphState.__init__
  58. .. automethod:: abp.GraphState.add_qubit
  59. .. automethod:: abp.GraphState.act_local_rotation
  60. .. automethod:: abp.GraphState.act_hadamard
  61. .. automethod:: abp.GraphState.act_cz
  62. .. automethod:: abp.GraphState.act_circuit
  63. .. automethod:: abp.GraphState.measure
  64. .. automethod:: abp.GraphState.to_json
  65. .. automethod:: abp.GraphState.to_state_vector
  66. .. automethod:: abp.GraphState.to_stabilizer
  67. .. automethod:: abp.GraphState.remove_vop
  68. .. automethod:: abp.GraphState.measure_x
  69. .. automethod:: abp.GraphState.measure_y
  70. .. automethod:: abp.GraphState.measure_z
  71. .. _clifford:
  72. The Clifford group
  73. ----------------------
  74. .. automodule:: abp.clifford
  75. |
  76. The ``clifford`` module provides a few useful functions:
  77. .. autofunction:: abp.clifford.use_old_cz
  78. :noindex:
  79. Visualization
  80. ----------------------
  81. ``abp`` comes with a tool to visualize graph states in a WebGL compatible web browser (Chrome, Firefox, Safari etc). It uses a client-server architecture.
  82. First, run ``abpserver`` in a terminal:
  83. .. code-block:: bash
  84. $ abpserver
  85. Listening on port 5000 for clients..
  86. Then browse to ``http://localhost:5001/`` (in some circumstances ``abp`` will automatically pop a browser window).
  87. Now, in another terminal, use ``abp.fancy.GraphState`` to run a Clifford circuit::
  88. >>> from abp.fancy import GraphState
  89. >>> g = GraphState(range(10))
  90. >>> g.act_circuit([(i, "hadamard") for i in range(10)])
  91. >>> g.act_circuit([((i, i+1), "cz") for i in range(9)])
  92. >>> g.update()
  93. And you should see a 3D visualization of the state. You can call ``update()`` in a loop to see an animation.
  94. .. image:: ../examples/viz.png
  95. Reference
  96. ----------------------------
  97. More detailed docs are available here:
  98. * :ref:`genindex`
  99. * :ref:`modindex`
  100. * :ref:`search`