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@@ -153,27 +153,9 @@ Quantum mechanics is nondeterminstic. However, it's often useful to get determin |
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Visualization |
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---------------------- |
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``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. |
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You can visualize states in 3D using the tool at `https://abv.peteshadbolt.co.uk/`. At some point I will merge the code for that server into this repo. |
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First, run ``abpserver -v`` in a terminal: |
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.. code-block:: bash |
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$ abpserver -v |
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Listening on port 5000 for clients.. |
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This ought to pop open a browser window at ``http://localhost:5001/``. You can run ``abpserver --help`` for help. Now use an instance of ``abp.VizClient`` to show the state in the browser:: |
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>>> from abp import GraphState, VizClient |
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>>> g = GraphState(10) |
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>>> g.act_circuit([(i, "hadamard") for i in range(10)]) |
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>>> g.act_circuit([((i, i+1), "cz") for i in range(9)]) |
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>>> v = VizClient() |
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>>> v.update(g) |
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And you should see a 3D visualization of the state. You can call ``update()`` in a loop to see an animation. |
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By default, the graph is automatically laid out in 3D using the Fruchterman-Reingold force-directed algorithm (i.e. springs). If you want to specify geometry, give each node a position attribute:: |
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In order to visualize states you must give each node a position attribute:: |
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>>> g.add_qubit(0, position={"x": 0, "y":0, "z":0}, vop="identity") |
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>>> g.add_qubit(0, position={"x": 1, "y":0, "z":0}, vop="identity") |
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@@ -182,10 +164,18 @@ There's a utility function in ``abp.util`` to construct those dictionaries:: |
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>>> from abp.util import xyz |
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>>> g.add_qubit(0, position=xyz(0, 0, 0), vop="identity") |
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>>> g.add_qubit(1, position=xyz(0, 0, 1), vop="identity") |
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>>> g.add_qubit(1, position=xyz(1, 0, 0), vop="identity") |
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Then it's really easy to get a 3D picture of the state:: |
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>>> g.push() |
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Shared state to https://abv.peteshadbolt.co.uk/lamp-moon-india-leopard |
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Note that if **any** nodes are missing a ``position`` attribute, ``abp`` will revert to automatic layout for **all** qubits. |
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That's a secret URL that you can use to collaboratively edit and view graph states in the browser. There are only a few billion such URLs so it should not be considered extremely secure. If you want, you can also load an existing state:: |
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>>> g = GraphState() |
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>>> g.pull("https://abv.peteshadbolt.co.uk/lamp-moon-india-leopard") |
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>>> g.show() |
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GraphState API |
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------------------------- |
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